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Hello and welcome back Shark. 
Here's to another episode of 

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Deep Dives with Sharks. 
My name is Alex and I'm the host

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of this thing and I'm just 
trying to bring peace, freedom, 

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justice and security to my new 
empire of sharks. 

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Anyway, I appreciate y'all 
sticking with me while I was 

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gone for two months on another 
impromptu hiatus, but I have a 

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little rundown slash update. 
I travelled over 11,000 miles 

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since May 22nd through June 15th
and I saw zero sharks. 

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So America, why are there no 
sharks in the middle of our 

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country? 
Feel like that needs to be 

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fixed, among with many other 
things. 

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But anyway, I should be done 
with travel for a little bit, 

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which is exciting, at least I'm 
hoping so, and I should be able 

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to settle into a rhythm and be 
more productive. 

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It's also been requested that we
do another movie review. 

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So that will be coming along 
with, of course, our annual 

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Shark Week versus Shark Fest 
reviews. 

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Once I actually watch the 
programming because I was a 

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little bit busy and missed most 
of it. 

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I'm still trying to get this 
more uniform and still streaming

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on the weekends to talk many 
things sharky. 

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So follow the links in the tap 
link in the description so that 

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you'll be able to get to all 
these social medias. 

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But here we are getting this 
episode out once again. 

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I'm very glad to have you all 
here now to stay up to date on 

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everything Deep Dives with 
Sharks, hit the follow button on

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Spotify, Apple Music, Instagram,
Twitch, YouTube, Amazon Music or

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anywhere else that you get your 
podcasts at Deep Dives with 

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sharks. 
Feel free to ask any questions, 

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share any comments or any shark 
related content on the social 

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media and in the comments. 
And I did want to thank a couple

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people that I think recently 
found the stream or the podcast.

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I'll say as they did a comment 
on like every episode that they 

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had listened to, which is 
incredible. 

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And I do really appreciate that.
And I think we're also really 

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close to hitting 2800 followers,
which is incredible. 

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So I want to thank you guys all 
very much for all your support. 

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But I do have a little bit of a 
correction slash question corner

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for this episode. 
I haven't asked some more 

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questions since last episode and
I figure I'll answer them here. 

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So feel free to ask questions in
the comments or DMS and I'll 

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answer them here occasionally so
that every episode is in a long 

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question corner And then 4 
minutes of sharks. 

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I feel like a lot of us have 
started listening to a podcast 

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and then realized that the intro
becomes longer than the content 

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and that's not as fun to listen 
to. 

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So here we'll go ahead and we 
will try to figure out how to 

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make this nice balance. 
But First off, I got a question 

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from Ted and Georgia. 
They asked how many bones a 

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basking shark would have. 
As I had previously mentioned, 

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they have no bones besides a jaw
as many other sharks. 

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And I haven't come across really
any sharks that have bones, just

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cartilage and similar 
structures. 

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But there are so many sharks to 
cover still, so there could be 

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one out there. 
Plus, researchers are always 

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finding new sharks and could 
discover a Bony shark. 

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So we'll have to wait and see. 
I do want to clarify a little 

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bit though, because of course, 
having the jaws and teeth count 

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as a bone can be a little bit 
confusing, especially for a 

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large shark like a basking shark
where you don't really see their

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teeth. 
Because whale sharks and basking

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sharks appear to be toothless, 
but they actually have hundreds 

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of very small hooked teeth. 
They're easy to see if you're 

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like right next to it and like 
being its dentist, but of course

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if you're just looking at a 
picture of it, it's very hard. 

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They don't use those teeth to 
hold or bite prey as they are 

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filter feeders, but those teeth 
are believed to help with 

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filtration. 
All this to say, depending on 

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the source, sharks will have 
anywhere from zero to 1 bones 

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depending on if they count the 
jaw and others will count the 

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teeth which gives a wide range. 
But yeah, they do have very few 

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bones, and they are pretty much 
made-up entirely of cartilage. 

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There also was another comment 
which unfortunately I couldn't 

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find but I remember seeing it. 
Someone asked after watching 

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episode 2 I believe it was that 
due to further research, is it 

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still not recommended to punch 
sharks? 

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Which amazing question and I did
want to update this a little bit

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and I kept forgetting so here we
are. 

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But after looking more into it, 
you should never just go punch a

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shark for no reason. 
And you should avoid touching 

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sharks in general because 
similar to dogs or other 

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animals, we don't know how 
temperamental they'll be. 

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So they could perceive like a 
touch that's just supposed to be

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like a nice friendly pet as an 
attack. 

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And then they'll retaliate and 
bite you, which is not great. 

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But you should try to keep some 
distance from larger sharks. 

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And it won't be easy to redirect
them with like a gentle push. 

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You'll actually have to have 
like a little bit of force 

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behind it. 
So having something to keep that

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distance between you and the 
shark is never a bad idea. 

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Usually there's like shark 
bullies or things like that. 

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Those will be really helpful 
because it'll bite that instead 

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of your hand if it doesn't like 
where it was touched. 

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Now, if a shark does bite you 
and is holding on, then yeah, 

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punching it is not a bad idea at
all. 

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Go for the parts that'll be a 
bit more sensitive like the eyes

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or nose as the ambulate of 
Lorenzini will go into a frenzy 

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when it's touched and it can 
cause them to open their mouth. 

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Now if you get bit and the shark
let's go in a swimming away and 

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you decide you're going to go 
fight it in the parking lot, 

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it's not really recommended 
because you probably already 

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need medical attention and that 
shark is not going to be in the 

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parking lot anyway so you're 
just kind of wasting time. 

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But the TLDR version is you 
don't punch sharks in general or

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for fun. 
Try to have something to help 

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push a shark away if it's 
getting too close for comfort. 

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But of course, if a shark is 
biting you punch it like don't 

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just sit there and be like, 
well, Alex told me not to to 

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punch this shark, but it is 
currently eating my foot. 

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So I'll stop that. 
Not like you swing on it. 

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It's that's fine. 
That's the common sense here. 

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If you're in danger, punch a 
shark. 

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If not, don't punch a shark. 
There we go. 

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Now getting into the actual 
sharks for this episode. 

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And I did say sharks because we 
are, of course dealing with 

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another three shark episode. 
The first shark we're going to 

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be talking about is the blue 
shark. 

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The blue shark is the only shark
in their genus and are found in 

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deeper waters of temperate and 
tropical environments. 

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They vary in size by gender, 
with males going to be about 

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1.82 to 2.82 meters or 6 to 9.3 
feet long, and females tend to 

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grow to be about 2.2 to 3.3 
meters or 7.2 to 10.8 feet long.

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So they want to get a little bit
bigger. 

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They just identify as the other 
gender and they change. 

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Not actually it's a just a 
little funny ha ha. 

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But you know, females are 
bigger. 

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They tend to have sleek bodies 
with a smaller dorsal fin, very 

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long pectoral fins and their 
tail is similar to a nurse shark

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although closer to equal on top 
and bottom but it does still 

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have a little notch at the tip. 
They tend to look surprised to 

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see everyone's here as their 
eyes are large and tend to have 

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a people so you can see a little
bit of like the whites of their 

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eye. 
Their mouth is slightly open and

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they have an elongated snout. 
They do really appreciate that 

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everyone came to their surprise 
party and they were 100% 

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surprised. 
They tend to weigh between 27 

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and 55 kilograms or 60 to 121 
lbs for males and for females 

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that go anywhere from 93 to 182 
kilograms or 205 to 401 lbs. 

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Larger females have gotten up to
204kg or 450 lbs So which I 

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think it might have been one O 5
initially. 

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I'm not realizing that the two O
5 is less. 

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Anyway, I think I did my numbers
wrong I apologize. 

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There the blue shark has five 
senses similar to many other 

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requiem sharks that include 
vision, hearing, lateral line 

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which is a sensory organ that 
helps detect vibrations and 

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changes in water pressure which 
is according to Google Electro 

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reception. 
So that system that allows them 

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to sense electronic pulses in 
the water such as heartbeat and 

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also chemo reception or chemo 
reception that helps determine 

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food sources such as fish stress
juices released into the water. 

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They also have special eyes 
compared to other sharks as they

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like being anywhere from the 
surface of the water to 350 

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meters or 1150 feet. 
So their eyes are able to adjust

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to that bright and very dim 
light settings. 

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So that's also why you can see 
the pupil a little bit. 

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They are given full 360° vision 
vertically and up to about 338° 

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horizontally. 
So they can't see completely 

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around themselves, but they're 
pretty darn close to it. 

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For reference, humans have about
like 180 vision I believe it is.

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Think a little bit more. 
They cover a wide range of the 

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ocean, as far north as Norway 
and as far South as Chile. 

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So pretty much everywhere except
for Antarctica and the North 

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Pole. 
They are mostly found in water 

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temperatures between 12 and 20°C
or 54 to 68°F, but have gone 

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from 3.9 to 31°C or 39 to 
87.8°F. 

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Which I will say Celsius makes 
so much more sense for measuring

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temperatures. 
A Fahrenheit's a lot more 

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specific, but when I'm trying to
explain to a European that it's 

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106° and they think that 
everything's just boiling, it is

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pretty Dang hot out. 
But we're not all just catching 

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on fire. 
Well, we do have wildfires 

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anyway. 
Blue sharks, like many other 

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sharks, migrate across the ocean
during seasonal changes, as well

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as looking for more food or 
better environments. 

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They usually swim around 1.3 
kilometers an hour during the 

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day, but are more active at 
night, swimming in about 2.8 

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kilometers per hour now. 
These bursts occur throughout 

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the water column, as these 
sharks will search for food in 

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deeper than 100 meters if 
necessary. 

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They do tend to move closer or 
further from the surface 

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depending on temperatures and if
they need to warm up more, but 

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sometimes they do it just to 
work on a tan because they are 

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rather blue. 
They're not quite as blue as a 

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member of the Blue Man Group, 
but much more blue than a sand 

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tiger shark. 
Now, blue sharks tend to eat a 

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lot of different organisms as 
they inhabit many areas of the 

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ocean. 
Well, pretty much the entire 

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ocean except for, you know, the 
North and South Poles. 

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But they don't like the cold 
anyway. 

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They prefer squid over 
everything else. 

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But we'll also eat blanket and 
pelagic octopus, cuttlefish, 

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lobster, crab, shrimp, and many 
Bony fish. 

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They yearn for the bones since 
sharks don't have bones. 

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I've been talking a lot about 
cartilage and sharks recently. 

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I'm going to eventually get off 
that topic I swear. 

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But outside of the Bony fish, 
they also eat smaller sharks, 

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some birds and porpoise and 
whale blubber. 

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Now blue sharks benefit from 
pack hunting as they can stir up

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a bait ball that forces fish 
towards the surface. 

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They can then catch their prey 
easier. 

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It's easier to catch things in a
group versus an individual, 

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unless it's like a shark. 
They like individuals, sometimes

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small fish. 
Anyway, there's a whole thing 

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like a tangent I can go on but I
won't. 

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But you can see bait balls a lot
while you're at the beach as the

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water tends to look like it's 
boiling from the surface. 

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But that's just because of the 
bait. 

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The fish are all towards the 
surface and are trying to get 

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away from whatever is currently 
hunting them. 

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Now just because you see a bait 
ball, that doesn't necessarily 

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mean that there's a shark there.
Other animals like dolphins or 

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fish like tuna will stir up bait
balls while hunting. 

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Blue sharks are prey for larger 
sharks such as great whites or 

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tiger sharks. 
But I've also been haunted by 

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orca, which is why I'm not a 
huge fan of orcas because they 

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just eat too many sharks. 
But not only do these sharks 

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have to worry about larger 
sharks and orcas, but also 

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parasites like the 
tetrafyllidine tapeworm and 

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mammals like California sea 
lions, northern elephant seals 

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and Cape fur seals. 
So real quick, blue sharks, you 

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and I got to have a quick chat 
here. 

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You have to step it up. 
Great whites will try to eat all

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these things and y'all are 
getting got by them. 

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So we got to work on it. 
OK, thanks. 

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Now, humans don't encounter blue
sharks in the wild often as they

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00:11:32,000 --> 00:11:35,120
like the open ocean and we don't
really hunt them, but there have

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been only 13 bites by blue 
sharks on humans from 1580 until

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2013. 
Now, since 2013 there have been 

229
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over 500. 
I'm kidding, there's been 0. 

230
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They're still sitting at 13 
bites total. 

231
00:11:47,640 --> 00:11:49,600
So humans don't interact with 
them very often. 

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They have been unsuccessfully 
kept in captivity on multiple 

233
00:11:52,520 --> 00:11:55,920
occasions, but have either died 
or been returned to the ocean 

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after a few months. 
They are relatively easy to feed

235
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and transports. 
That's not the problem. 

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The problem is that they don't 
do well with flat surfaces and 

237
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tend to injure themselves. 
So kind of a little bit of a 

238
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recession as like who they get 
haunted by and getting got by 

239
00:12:09,160 --> 00:12:11,320
fish tanks. 
But that's also why it's very 

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important for the zoologists and
zookeepers and Aquarius in the 

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00:12:16,800 --> 00:12:19,680
aquariums to know what animals 
they're taking care of. 

242
00:12:19,680 --> 00:12:23,360
Animals can be very susceptible 
to injury or illness and not 

243
00:12:23,360 --> 00:12:26,440
knowing these things can be very
detrimental for the animal. 

244
00:12:26,960 --> 00:12:29,280
Now blue sharks are listed as 
not threatened for their 

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00:12:29,280 --> 00:12:32,120
conservation status as they tend
to do fine in the wild and they 

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00:12:32,120 --> 00:12:33,800
really aren't messed with by 
humans. 

247
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So it's really exciting, but 
that's what I have for the blue 

248
00:12:37,240 --> 00:12:39,080
shark. 
Of course, any questions, any 

249
00:12:39,080 --> 00:12:41,480
comments, concerns, anything of 
that nature, you can always send

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00:12:41,480 --> 00:12:45,040
them over to me on the social 
media, anything in the tap link 

251
00:12:45,040 --> 00:12:47,240
or in the comments. 
Now going on to the next one, we

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have the pajama shark. 
Now pajama sharks are also known

253
00:12:51,160 --> 00:12:54,840
as the striped cat shark as they
are a member of the cat shark 

254
00:12:54,840 --> 00:12:57,040
family. 
Now it gets its name from the 

255
00:12:57,040 --> 00:13:00,080
stripes that run down the length
of its body, which mimic striped

256
00:13:00,080 --> 00:13:01,920
pyjamas. 
And for the adults listening, 

257
00:13:03,000 --> 00:13:06,120
the pyjama shark did not inspire
that movie that's from World War

258
00:13:06,120 --> 00:13:07,720
2. 
And for the kids listening, 

259
00:13:08,240 --> 00:13:10,000
don't worry, it's just striped 
pyjamas. 

260
00:13:10,040 --> 00:13:12,880
This shark is very different 
from other cat sharks as it 

261
00:13:12,880 --> 00:13:18,680
grows to be a bit larger at 1.1 
meters or 3.6 feet and around 79

262
00:13:18,680 --> 00:13:22,960
kilograms or 17 lbs. 
Now that puts them at a very 

263
00:13:22,960 --> 00:13:26,280
small side for sharks as the 
average is about 5 feet. 

264
00:13:26,280 --> 00:13:30,080
So they are a couple feet 
shorter than that and if you're 

265
00:13:30,160 --> 00:13:32,520
over 5 feet tall, 
congratulations, you are taller 

266
00:13:32,520 --> 00:13:35,400
than the average shark. 
Now pajama sharks have a very 

267
00:13:35,400 --> 00:13:37,280
Flathead. 
It's almost like someone stepped

268
00:13:37,280 --> 00:13:39,880
on their nose. 
They have barbels that hang off 

269
00:13:39,880 --> 00:13:41,840
of their nose, but they don't 
reach their mouth. 

270
00:13:42,320 --> 00:13:45,720
The snout comes almost to a 
blunt point, so similar to a 

271
00:13:45,720 --> 00:13:47,800
tiger shark, but it's much more 
flat. 

272
00:13:47,800 --> 00:13:50,280
I don't believe I've ever had to
go over a shark's nostrils 

273
00:13:50,280 --> 00:13:53,360
before, as they usually tend to 
operate similar to ours, but 

274
00:13:53,360 --> 00:13:55,320
instead of smelling air, they 
smell water. 

275
00:13:55,640 --> 00:13:58,200
But today we get to talk about a
pajama shark's nostrils because 

276
00:13:58,200 --> 00:14:01,320
they're different. 
Now they have 3 lobes, one for 

277
00:14:01,320 --> 00:14:04,280
in current, one for X current, 
and then they have the barbell 

278
00:14:04,280 --> 00:14:06,000
which is also part of the 
nostril. 

279
00:14:06,000 --> 00:14:09,280
And I couldn't find a whole lot 
on what those barbels do, so I'm

280
00:14:09,280 --> 00:14:12,000
assuming they operate similar to
other fish, just helping with 

281
00:14:12,000 --> 00:14:14,840
sensing things around them. 
Their eyes are horizontally 

282
00:14:14,840 --> 00:14:18,000
Oval, meaning that you take an 
Oval and you put the long ends 

283
00:14:18,000 --> 00:14:20,640
on the top and bottom and boom, 
pajama shark eye. 

284
00:14:21,280 --> 00:14:24,360
Now their eyes are also rather 
wide set compared to other 

285
00:14:24,360 --> 00:14:25,920
sharks. 
So for a little bit of clarity, 

286
00:14:25,920 --> 00:14:29,320
they're not quite as far apart 
as Sid the Sloth from Ice Age. 

287
00:14:30,040 --> 00:14:32,560
They're also not hammerhead 
length, but if you take like a 

288
00:14:32,560 --> 00:14:35,360
black tip reef shark and then 
put the eyes a little bit wider,

289
00:14:35,360 --> 00:14:37,560
then there you have it. 
It's about how far wide their 

290
00:14:37,560 --> 00:14:40,320
eyes are. 
They have a deep Ridge that runs

291
00:14:40,320 --> 00:14:42,280
under their eye, which looks 
pretty neat. 

292
00:14:42,680 --> 00:14:45,720
The pajama shark has a slender 
body that becomes more narrow 

293
00:14:45,720 --> 00:14:48,000
towards the tail. 
So they kind of start narrow, 

294
00:14:48,000 --> 00:14:51,640
get a bit wider, and then get 
narrow again, almost kind of 

295
00:14:51,640 --> 00:14:54,400
like a torpedo would. 
Other pectoral fins are slightly

296
00:14:54,400 --> 00:14:57,440
large for their body, but the 
two dorsal fins are very small 

297
00:14:57,440 --> 00:15:00,000
comparatively. 
The dorsal fins sit further back

298
00:15:00,000 --> 00:15:02,840
on their body, with the first 
one being about 3/4 of the way 

299
00:15:02,840 --> 00:15:06,080
down their back and the second 
being just before the tail. 

300
00:15:07,080 --> 00:15:10,480
All their fins, excluding their 
pectoral fins are rather small 

301
00:15:10,480 --> 00:15:11,840
and that does include their 
tail. 

302
00:15:12,240 --> 00:15:15,080
Their tail is taller on the top 
than the bottom as they are 

303
00:15:15,080 --> 00:15:18,680
bottom dwelling fish and usually
fish that have longer tails on 

304
00:15:18,680 --> 00:15:21,680
top are bottom dwelling as they 
want to make sure they're not 

305
00:15:21,680 --> 00:15:24,160
going to drag their tail along 
the floor which could cause 

306
00:15:24,160 --> 00:15:25,640
injury. 
And then of course that can 

307
00:15:25,640 --> 00:15:27,160
cause so many more 
complications. 

308
00:15:27,160 --> 00:15:29,920
So just a nice little 
evolutionary thing to help out. 

309
00:15:31,240 --> 00:15:34,760
Now they have 18 to 25 rows of 
teeth on their top jaw depending

310
00:15:34,760 --> 00:15:38,160
on the individual and 14 to 24 
rows on the bottom. 

311
00:15:38,240 --> 00:15:41,040
The pajama shark's teeth are 
shaped somewhat similar to a 

312
00:15:41,040 --> 00:15:44,240
frilled shark where they have a 
longer central cusp and they 

313
00:15:44,240 --> 00:15:47,440
will have two smaller cusps on 
either side which creates a Tri 

314
00:15:47,440 --> 00:15:50,360
cusp and tooth. 
Now, cat sharks tend to have 

315
00:15:50,360 --> 00:15:53,320
thicker skin as they are a 
smaller species of shark, thus 

316
00:15:53,320 --> 00:15:55,200
providing a little bit more 
protection. 

317
00:15:55,680 --> 00:15:58,400
The pyjama shark, being a cat 
shark, also has thicker skin, 

318
00:15:58,400 --> 00:16:02,000
which helps to protect against 
predators like crabs or other 

319
00:16:02,080 --> 00:16:03,880
smaller fish that can't bite 
them. 

320
00:16:04,840 --> 00:16:08,400
It doesn't help a whole lot, 
evidently, especially if larger 

321
00:16:08,400 --> 00:16:10,680
sharks are able to eat them and 
other large fish. 

322
00:16:11,080 --> 00:16:14,280
But you know, at least the crab 
that usually goes for things 

323
00:16:14,280 --> 00:16:16,360
that have already died won't eat
them, so that's good. 

324
00:16:17,280 --> 00:16:20,200
Pyjama sharks are found around 
South Africa, especially the 

325
00:16:20,200 --> 00:16:22,880
southern tip. 
They like waters that are as 

326
00:16:22,880 --> 00:16:27,600
deep as 4 meters or 13 feet, so 
rather deep, but they do go much

327
00:16:27,600 --> 00:16:32,280
deeper, about 50 to 100 meters 
or 160 to 330 feet. 

328
00:16:32,720 --> 00:16:35,600
They prefer rocky reefs as they 
can utilize caves, which are one

329
00:16:35,600 --> 00:16:38,600
of their preferred habitats when
hunting. 

330
00:16:38,840 --> 00:16:41,800
Pajama sharks tend to go for 
Bony fishes such as anchovy or 

331
00:16:41,800 --> 00:16:45,360
hogfish, smaller sharks and 
rays, as well as egg cases, 

332
00:16:45,640 --> 00:16:49,120
bivalves, cephalopods and 
crustaceans, which most sharks 

333
00:16:49,200 --> 00:16:51,440
do enjoy eating. 
Cephalopods and crustaceans, 

334
00:16:51,440 --> 00:16:53,960
I'm, I mean kind of just lump 
them all together in that one. 

335
00:16:54,000 --> 00:16:56,560
They are opportunistic feeders 
and will take advantage of 

336
00:16:56,560 --> 00:16:59,680
whatever they can get, including
ripping off tentacles from an 

337
00:16:59,680 --> 00:17:02,720
octopus or cuttlefish, which I 
do believe both of those are 

338
00:17:02,720 --> 00:17:04,440
able to regenerate those 
tentacles. 

339
00:17:04,839 --> 00:17:07,800
So it is rather kind of them to 
consider that it will grow back 

340
00:17:07,800 --> 00:17:10,440
before taking it. 
But they also are sort of 

341
00:17:10,440 --> 00:17:12,800
practicing sustainable food 
sourcing in that sense. 

342
00:17:13,119 --> 00:17:15,160
If it'll grow back, you can get 
it later again. 

343
00:17:15,160 --> 00:17:17,480
That's why you got to make sure 
you're doing sustainable fishing

344
00:17:17,520 --> 00:17:19,319
anyway. 
That's dumb, but the pajama 

345
00:17:19,319 --> 00:17:22,200
shark has been observed 
ambushing chaka squid during 

346
00:17:22,200 --> 00:17:26,000
mass spawnings as they like to 
hide among the rocky surface and

347
00:17:26,000 --> 00:17:29,400
wait for the squid to descend to
deposit its eggs on a rocky 

348
00:17:29,400 --> 00:17:31,880
surface on the reef. 
And then they go eat them. 

349
00:17:32,520 --> 00:17:35,320
Of course it's always hunt or be
haunted because they are haunted

350
00:17:35,320 --> 00:17:39,240
by broad nose 7 gill sharks and 
are that sharks preferred food 

351
00:17:39,240 --> 00:17:41,440
source. 
And that also made me realize 

352
00:17:41,440 --> 00:17:45,160
that I'm not sure why they made 
the saying a dog eat dog world 

353
00:17:45,440 --> 00:17:48,400
because you'd never really hear 
about dogs eating each other, 

354
00:17:48,400 --> 00:17:50,680
but you always hear about sharks
eating each other. 

355
00:17:51,000 --> 00:17:53,600
And I mean they really can't 
stop eating each other except 

356
00:17:53,600 --> 00:17:55,240
for like the whale and basking 
sharks. 

357
00:17:55,240 --> 00:17:57,760
They kind of just chill and not 
a whole lot eats them. 

358
00:17:57,760 --> 00:18:00,440
So that's kind of neat. 
But pajama sharks are oviparous,

359
00:18:00,440 --> 00:18:03,840
so egg laying they can lay 1 egg
at a time. 

360
00:18:04,120 --> 00:18:08,760
So there will only be 1 Bebe. 
Their eggs tend to be 9.5cm or 

361
00:18:08,760 --> 00:18:12,800
3.7 inches long and they have 
tendrils which are kind of like 

362
00:18:12,800 --> 00:18:14,640
these long strings that come off
of them. 

363
00:18:14,960 --> 00:18:18,560
So that way Mama shark can 
anchor them to a rock or a plant

364
00:18:18,560 --> 00:18:22,200
or something that won't allow it
to be taken away by the current,

365
00:18:22,200 --> 00:18:24,640
roll around or get damaged as 
easily. 

366
00:18:24,640 --> 00:18:27,720
Now these sharks do interact 
with humans rather frequently as

367
00:18:27,720 --> 00:18:31,280
they tend to be in shallower 
waters and they look pretty, so 

368
00:18:31,280 --> 00:18:35,000
humans often want to see them. 
We also like catching them by 

369
00:18:35,000 --> 00:18:38,840
accident as bycatch and many 
fishers find them to be a pest 

370
00:18:38,840 --> 00:18:40,840
since they'll take bait right 
off the line. 

371
00:18:41,120 --> 00:18:44,600
So usually they'll see them and 
then kill them on site, which is

372
00:18:44,800 --> 00:18:47,360
rather messed up. 
But despite all this, they're 

373
00:18:47,360 --> 00:18:50,200
listed as least concerned due to
lack of evidence for population 

374
00:18:50,200 --> 00:18:53,520
decline, which this shark of 
course raised a huge question 

375
00:18:53,520 --> 00:18:55,720
for me. 
This shark inhabits such a small

376
00:18:55,720 --> 00:18:59,160
area and only lays 1 egg at a 
time, which makes me wonder, 

377
00:18:59,160 --> 00:19:02,240
would they be more susceptible 
to rapid population decline 

378
00:19:02,240 --> 00:19:05,080
compared to other sharks as the 
blue shark covers pretty much 

379
00:19:05,240 --> 00:19:08,200
everywhere and it would take a 
lot to put a dent in their 

380
00:19:08,200 --> 00:19:10,920
population. 
Now, unfortunately, I don't have

381
00:19:10,920 --> 00:19:13,640
an answer to that, so I might 
try to reach out to a couple 

382
00:19:13,640 --> 00:19:16,440
shark experts and see if any of 
them have a good answer for that

383
00:19:16,440 --> 00:19:19,040
because I think that'd be a 
really interesting topic to talk

384
00:19:19,040 --> 00:19:20,360
about. 
Yeah. 

385
00:19:20,520 --> 00:19:22,000
So that's what I have for the 
pajama shark. 

386
00:19:22,040 --> 00:19:24,240
Appreciate you guys checking in 
on that one too. 

387
00:19:24,640 --> 00:19:26,520
And of course, we have our final
one. 

388
00:19:26,520 --> 00:19:29,000
Now, this one was actually 
requested quite a few times. 

389
00:19:29,040 --> 00:19:31,400
I think the most recent one was 
about 18 days ago. 

390
00:19:31,400 --> 00:19:34,760
So surprise, here it is. 
It's the spiny dogfish. 

391
00:19:36,160 --> 00:19:39,000
Now, spiny dogfish were one of 
the first sharks that I learned 

392
00:19:39,000 --> 00:19:42,000
lived in Maryland waters, which,
fun fact, so do blue sharks. 

393
00:19:42,000 --> 00:19:44,680
So I always get a little bit 
excited when I see them on my 

394
00:19:44,680 --> 00:19:48,120
timeline or hear anyone talking 
about them or get a chance to 

395
00:19:48,120 --> 00:19:49,760
see them anywhere. 
It's really cool. 

396
00:19:50,560 --> 00:19:53,240
They also make me think of 
Dogfish Head Brewery and their 

397
00:19:53,240 --> 00:19:57,480
60 minute IPA and Sequential 
because I just love them so 

398
00:19:57,480 --> 00:19:58,480
much. 
Dogfish Head. 

399
00:19:58,480 --> 00:20:01,040
If y'all are looking to sponsor 
a podcast, I'm available. 

400
00:20:01,360 --> 00:20:03,800
Slide in these DMS. 
Kidding kind of. 

401
00:20:04,360 --> 00:20:06,880
Land Shark's also acceptable. 
If there's any shark related 

402
00:20:06,880 --> 00:20:09,840
product that is looking to 
sponsor a podcast, hit me up. 

403
00:20:09,960 --> 00:20:13,040
We can make something happen. 
But anyway, spiny dogfish vary 

404
00:20:13,040 --> 00:20:16,320
in size depending on their 
gender, with males growing to be

405
00:20:16,320 --> 00:20:20,560
about 24 to 35 inches or two to 
just under 3 feet, which is 

406
00:20:20,560 --> 00:20:23,600
about 70 to 100 centimeters or 
about a meter. 

407
00:20:23,960 --> 00:20:26,600
And I'm still trying to figure 
out why they used these smaller 

408
00:20:26,600 --> 00:20:30,560
measures as my brain hears 24 to
35 inches and thinks that's 

409
00:20:30,560 --> 00:20:33,840
rather small until I realize 
it's two to three feet. 

410
00:20:33,840 --> 00:20:36,800
And I'm like, it's like half a 
person noted. 

411
00:20:37,640 --> 00:20:39,720
Which is just kind of disrespect
for the sharks as well. 

412
00:20:40,240 --> 00:20:44,160
But these guys are mostly grey. 
They do have white spots along 

413
00:20:44,160 --> 00:20:46,720
their back though. 
They have two smaller dorsal 

414
00:20:46,720 --> 00:20:49,760
fins on their back as well. 
The first is dead center and 

415
00:20:49,760 --> 00:20:52,280
almost looks a bit like a sail 
with its triangular shape. 

416
00:20:52,680 --> 00:20:55,680
The second sits closer to the 
tail, but not quite as close as 

417
00:20:55,680 --> 00:20:58,800
the pajama shark second dorsal 
fin, which is practically fused 

418
00:20:58,800 --> 00:21:02,120
with their tail now. 
Their caudal and pectoral fins 

419
00:21:02,120 --> 00:21:05,040
are triangular as well, which is
different from many sharks that 

420
00:21:05,040 --> 00:21:08,360
tend to have rectangular or box 
shaped caudal fins. 

421
00:21:09,200 --> 00:21:12,040
Both their dorsal fins contain a
spine, hence the name spiny 

422
00:21:12,040 --> 00:21:14,120
dogfish. 
But of course, these spines 

423
00:21:14,120 --> 00:21:16,200
aren't just there for 
decoration, they're used for 

424
00:21:16,200 --> 00:21:19,680
defense or to impale predators. 
They aren't done yet though, 

425
00:21:19,680 --> 00:21:22,360
because the spiny dogfish felt 
that stabbing those trying to 

426
00:21:22,360 --> 00:21:25,120
eat them was not enough. 
They also have venom in these 

427
00:21:25,120 --> 00:21:27,480
spines, which is just pretty 
hardcore. 

428
00:21:28,080 --> 00:21:31,320
Now, the venom is not lethal, 
but it will cause pain and can 

429
00:21:31,320 --> 00:21:33,720
cause a predator to think twice 
about trying to bite the shark 

430
00:21:33,720 --> 00:21:36,360
again in the future. 
Now, if humans are to be 

431
00:21:36,360 --> 00:21:39,240
impaled, we could. 
Emphasis on could because it 

432
00:21:39,240 --> 00:21:42,120
varies by the individual. 
Experience intense pain, 

433
00:21:42,200 --> 00:21:44,240
swelling, and redness at the 
sting site. 

434
00:21:45,000 --> 00:21:48,320
Other options are impaired 
mobility, so difficulty walking,

435
00:21:48,760 --> 00:21:52,520
dizziness, nausea, and abdominal
pain, all of which can last for 

436
00:21:52,520 --> 00:21:55,360
a few days or weeks. 
Still can't kill you though, so 

437
00:21:55,360 --> 00:21:58,160
that's pretty good. 
But the good news is that they 

438
00:21:58,160 --> 00:22:01,600
cover a very small area. 
And I lied again, they cover a 

439
00:22:01,600 --> 00:22:03,760
large area. 
They're found in coastal waters 

440
00:22:03,760 --> 00:22:07,120
of the eastern US and Canada, 
southern parts of South America.

441
00:22:07,120 --> 00:22:11,280
So around Chile, just around the
tip to about South of Brazil, 

442
00:22:11,680 --> 00:22:15,280
the Mediterranean Sea, Europe 
including the UK, Spain, 

443
00:22:15,280 --> 00:22:18,520
Portugal, France, Sweden, 
Finland, Norway. 

444
00:22:18,720 --> 00:22:21,600
And then we also have southern 
Australia and all around New 

445
00:22:21,600 --> 00:22:24,440
Zealand. 
Now thankfully humans don't have

446
00:22:24,440 --> 00:22:27,280
to worry about stepping on spiny
dogfish or dealing with their 

447
00:22:27,280 --> 00:22:30,560
shark venom as they are bottom 
dwellers and typically reside 

448
00:22:30,560 --> 00:22:36,200
around 50 to 149 meters, which 
is 160 to 490 feet but can go 

449
00:22:36,200 --> 00:22:40,080
all the way down to 700 meters 
or 2300 feet. 

450
00:22:40,320 --> 00:22:42,920
Which side note, it is such a 
weird number to cut off the 

451
00:22:42,920 --> 00:22:47,680
first numbers at 149 meters or 
490 feet, both for the shark if 

452
00:22:47,680 --> 00:22:51,600
they just don't go that extra 
like meter or scientists for 

453
00:22:51,600 --> 00:22:55,600
just not giving them that meter.
But for accuracy sake, we'll 

454
00:22:55,600 --> 00:22:57,520
keep it right where it is. 
They do have some human 

455
00:22:57,520 --> 00:23:01,040
interaction as in Europe, 
America, Canada, New Zealand, 

456
00:23:01,040 --> 00:23:05,840
Venezuela and Chile, they are 
served as food, which after 

457
00:23:05,840 --> 00:23:08,120
looking at a picture of the 
dish, it doesn't look very 

458
00:23:08,120 --> 00:23:09,200
appetizing. 
So like what? 

459
00:23:09,200 --> 00:23:12,080
What are we doing now? 
This funny dogfish is served 

460
00:23:12,080 --> 00:23:15,320
under a variety of names, 
including unwitting hound shark 

461
00:23:15,320 --> 00:23:19,280
in Greece, pus or rock salmon in
fish and chip shops across 

462
00:23:19,280 --> 00:23:23,840
Europe, small salmon in France, 
and then it's sea eel in Belgium

463
00:23:23,840 --> 00:23:27,720
and Germany. 
So it's sea space eel, not seal,

464
00:23:27,720 --> 00:23:30,280
but sea eel. 
They aren't only eaten, though, 

465
00:23:30,440 --> 00:23:33,800
They're also used in fertilizer,
liver oil and pet food. 

466
00:23:34,240 --> 00:23:37,280
Many countries have banned the 
sale and trade of dogfish for 

467
00:23:37,280 --> 00:23:41,040
the entire species or at least 
limit the numbers for sale. 

468
00:23:41,040 --> 00:23:44,360
Meanwhile others America have 
decreased regulations on fishing

469
00:23:44,360 --> 00:23:47,400
and drilling allowing for more 
sharks to be caught and sold. 

470
00:23:47,920 --> 00:23:51,000
Spiny dogfish like hunting 
impacts and are very social. 

471
00:23:51,400 --> 00:23:53,800
They've been counted in schools 
of thousands, which is one of 

472
00:23:53,800 --> 00:23:55,760
the largest schools of sharks 
I've heard of. 

473
00:23:56,040 --> 00:23:59,280
Now mind you, there could be 
another shark in larger 

474
00:23:59,280 --> 00:24:02,640
congregations, but for now I 
believe the spiny dogfish is in 

475
00:24:02,640 --> 00:24:04,640
the lead. 
Of course, correct me in the 

476
00:24:04,640 --> 00:24:06,680
comments if I'm wrong. 
I feel like some of y'all know 

477
00:24:06,680 --> 00:24:09,520
the podcast material better than
I do, and I actually do love 

478
00:24:09,520 --> 00:24:10,360
that. 
That's pretty neat. 

479
00:24:10,440 --> 00:24:13,840
But little side note, I forget 
which factor episode it was on, 

480
00:24:13,840 --> 00:24:16,480
but someone commented on a 
detail I gave about a shark and 

481
00:24:16,480 --> 00:24:19,560
started along the lines of well 
you were kind of on the right 

482
00:24:19,560 --> 00:24:22,400
track and then provided the 
information which I thought was 

483
00:24:22,400 --> 00:24:24,560
super helpful. 
So that's of course why I have 

484
00:24:24,560 --> 00:24:27,040
correction corner at the 
beginning and I'm also more 

485
00:24:27,040 --> 00:24:30,960
interactive on Instagram and in 
the Discord as I do not know how

486
00:24:30,960 --> 00:24:35,200
to reply on Spotify or Apple 
which is very boomer ask of me. 

487
00:24:35,240 --> 00:24:37,000
I'm working on it. 
But of course if you guys have 

488
00:24:37,000 --> 00:24:39,360
any questions or want to send 
any corrections, send them 

489
00:24:39,400 --> 00:24:41,120
wherever you can. 
I also have an e-mail you can 

490
00:24:41,120 --> 00:24:44,080
send it there too. 
But spiny dogfish eat a variety 

491
00:24:44,080 --> 00:24:47,800
of invertebrates including 
shrimp, fish, crabs, jellyfish, 

492
00:24:47,800 --> 00:24:50,760
squid, and sea cucumber. 
Unless it's super old and 

493
00:24:50,760 --> 00:24:52,800
chilling in vinegar. 
Then it's a sea pickle. 

494
00:24:53,960 --> 00:24:56,800
Yeah, we're going to just end 
the entire podcast after that 

495
00:24:56,800 --> 00:24:57,760
joke. 
That was bad. 

496
00:24:57,760 --> 00:24:59,640
That's just curtains on the 
entire thing. 

497
00:25:00,200 --> 00:25:01,480
I'm just kidding. 
Y'all are stuck with me. 

498
00:25:01,960 --> 00:25:04,240
So Spidey dogfish are 
ovoviviparous. 

499
00:25:04,240 --> 00:25:07,040
So that means the eggs hatch 
internally, but baby continues 

500
00:25:07,040 --> 00:25:09,520
to develop until it's ready to 
be birthed into a little shark 

501
00:25:09,520 --> 00:25:12,240
pup. 
Now, unlike every other animal, 

502
00:25:12,240 --> 00:25:15,840
this rather small shark has an 
insanely long gestation period, 

503
00:25:16,080 --> 00:25:18,600
typically lasting about 18 to 24
months. 

504
00:25:18,920 --> 00:25:21,720
And for reference, the typical 
rule is the larger the animal, 

505
00:25:21,720 --> 00:25:24,760
the longer the gestation period 
or the time that it takes to 

506
00:25:24,760 --> 00:25:27,040
make the baby. 
So elephants usually take a 

507
00:25:27,040 --> 00:25:31,320
while, about two years, while 
mice usually it takes about a 

508
00:25:31,320 --> 00:25:33,240
month. 
So spiny dogfish can give birth 

509
00:25:33,240 --> 00:25:36,960
to about 5 to 6 pups usually, 
but the numbers can vary. 

510
00:25:37,720 --> 00:25:41,160
They are listed as vulnerable 
under conservation status as 

511
00:25:41,160 --> 00:25:44,840
their numbers do well across 
most oceans, but they have had 

512
00:25:44,840 --> 00:25:47,880
some decline, especially in 
Europe where they were fished 

513
00:25:47,880 --> 00:25:51,120
into critical endangerment. 
But thankfully there are groups 

514
00:25:51,120 --> 00:25:53,880
such as Greenpeace that come 
together to help advocate for 

515
00:25:53,880 --> 00:25:57,520
sharks and a given the spiny 
dogfish in particular a chance 

516
00:25:57,520 --> 00:26:00,080
to rebound, which their numbers 
have been doing pretty well. 

517
00:26:00,880 --> 00:26:05,120
Now that is exactly what I have 
for these spiny dogfish and for 

518
00:26:05,120 --> 00:26:06,960
this episode. 
So I appreciate you guys 

519
00:26:06,960 --> 00:26:09,160
listening. 
I am going to try to get this a 

520
00:26:09,160 --> 00:26:11,880
little bit more routine. 
I appreciate y'all being here, 

521
00:26:11,880 --> 00:26:15,000
hanging out, chatting, just kind
of interacting in general. 

522
00:26:15,000 --> 00:26:18,120
It's been a lot of fun comment 
DM your favorite shark fact. 

523
00:26:18,120 --> 00:26:20,760
I might just share it Some of my
favorites at the beginning of 

524
00:26:20,760 --> 00:26:23,480
the episode. 
Give us a five star rating or 

525
00:26:23,680 --> 00:26:25,360
tell me what you want me to see 
do different. 

526
00:26:25,360 --> 00:26:27,640
Anything like that. 
I appreciate y'all being here. 

527
00:26:28,120 --> 00:26:31,200
Be kind to each other and I will
see you guys in the next one.

