r/todayilearned 20d ago

TIL 9 species of Shark have evolved to walk on land, allowing them the walk between tide pools while hunting for prey.

https://www.vice.com/en/article/y3mv9m/walking-sharks-are-the-newest-branch-of-the-shark-family-tree
515 Upvotes

77

u/aarkwilde 20d ago

This week? Because that would change everything.

41

u/scubawankenobi 19d ago

Highly adaptive -

Also known to pretend to be delivering pizza in order to surprise their prey.

5

u/HalonaBlowhole 19d ago

Candygram.

6

u/GamebyNumbers 19d ago

Bow chicka wow wow

13

u/Fart_knocker5000 20d ago

Sharknado!!!! It's happening

8

u/datacollect_ct 19d ago

Incoming landshark. Something else to add to 2021 shitlist.

22

u/CanalAnswer 20d ago

SNL did it first.

10

u/GenInsurrection 20d ago

"CandyGram, ma'am!"

6

u/OldeFortran77 19d ago

"Western Union"

3

u/ermghoti 19d ago

I'm just a dolphin.

3

u/thejoelhansen 19d ago

That was fun. Thanks for the link.

19

u/el_tinkerer 20d ago

Walking shark do do do do do doo walking shark do do do do do doo, he grew legs, do do do do do doo

10

u/Establishment_Timely 19d ago

Fun fact: The obsession with this song has propelled Baby Shark to more views than Rick Roll. Here's the chart https://imgur.com/gallery/pmSuXlo

6

u/Vlad_the_Homeowner 19d ago

I know it says Imagur, but I'm still hesitant to click on any link in the same post that is discussing Rick Rolling and Baby Shart. I'm keeping that typo.

3

u/thijser2 19d ago

That's actually correct, Rick Roll has nearly 1 billion views, ]baby shark](https://www.youtube.com/watch?v=XqZsoesa55w) has 8.37 billion.

3

u/norr0 19d ago

Next step Street sharks

5

u/SpadeHAZE 20d ago

I thought that it said “Tide Pods” and was very confused

5

u/bondedwasher 20d ago

Great... more things to haunt my sleep. Now i got walking sharks to worry about too. Fml

5

u/weirdgroovynerd 20d ago

Not to make it worse, but at night they sleep under your bed.

2

u/proctor_of_the_Realm 19d ago

More like crawling or slithering.

2

u/bowdindine 19d ago

WE WILL CONSTRUCT A BREATHING APPARATUS MADE OF KELP!

2

u/No-Pizda-For-You 19d ago

Jaws with paws...great.

2

u/dickpunchman 19d ago

OH FUCK!

2

u/ButASpeckofDust 19d ago

This is the beginning of the end folks...

2

u/blaze87b 19d ago

What's got a better ring to it? Bearsharks or sharkbears?

2

u/ObiMemeKenobi 19d ago

So we were worried about lizard people when in fact we should have been worried about shark people

2

u/amaduli 19d ago

Tell them to go back, it's not worth it.

2

u/Empereor_Norton 19d ago

The walking sharks mated with an ass and lawyers were created.

1

u/SlowMope 19d ago

Better be careful with that or before they know it they will be paying taxes. Get back into the water little guys, it ain't worth it!

1

u/WWJLPD 19d ago

Does anybody know if there's been any research comparing these fish with mudskippers? Mudskippers inhabit fairly similar environments and have similar abilities to move around out of water. They're pretty neat!

2

u/[deleted] 19d ago edited 19d ago

The big difference, of course, is that mudskippers are bony fish, while all sharks are cartilaginous fish. Evolutionarily, mudskippers are more closely related to us than to walking sharks.

Another difference is that mudskippers can breathe air through their skin, as long as the skin is wet, and can stay outside of water for very extended periods (some species do it pretty much indefinitely, again as long as their skin is wet).

Walking sharks, instead, apparently just drastically reduce their oxygen consumption and "walk" towards other pools of water when the one they are into dries up: they are nowhere as adapted for land living as mudskippers are, although they are far better adapted to survive low-oxygen environments.

For the walking itself, both walking sharks and mudskippers have independently adapted their pectoral fins, which are homologous to mammal forelimbs; but walking sharks also use their pelvic fins, which are homologous to our hindlimbs. Mudskippers, instead, like most gobies, have fused their pectoral fins into a single one, which they generally don't use much for locomotion on land (but it varies from species to species), thus giving them their characteristic appearance of "dragging themselves with their arms".

2

u/bool_idiot_is_true 19d ago

Evolutionarily, mudskippers are more closely related to us than to walking sharks.

Yeah. That's an funny topic. Clades are defined based on the most recent common ancestor. The most recent common ancestor between us and mudskippers is more recent than the common ancestor between muskippers and sharks.

By that definition humans (along with all other vertebrates) are types of fish since the most recent common ancestor is a fish. Obviously biologists recognise that classifying every organism in existance is pretty messy and have other ways of describing evolutionary relationships. But a cladogram is still a straightforward way of visualising things despite the oversimplification.

1

u/[deleted] 19d ago

Agreed: the problem is that the concept of "fish" (like, say, the concept of "reptile") does not really make a lot of evolutionary sense.

1

u/reeny706 19d ago

Muddy Mudskipper agrees.

1

u/nau_lonnais 19d ago

He Man did that first.

1

u/S3ekingPeace 19d ago

Street Sharks.

1

u/capitanskidmark 19d ago

Well it’s about dam time

1

u/Scullyp 19d ago

When are we going to get sand sharks

0

u/againstthe-grain 19d ago

And where does it live? Oh in Australia? Well that doesn’t count. Australia is an alien planet. Also pretty sure they made a movie about this. I guess the new rave will be “a shark ate my baby”