The Epaulette shark is only about 9 million years old as a species, making it the most recent branch in the shark family. And it is slowly but surely evolving into a land animal
I 100% had no idea that sea grass looked that much like, y’know, grass.
I do not know what I would have guessed it looked like, had anyone asked me to do so, but my answer would definitely have been Less Like Grass Than That.
Also it is adorable that sharks like to roll in the grass like horses.
yeah, this is what sharkskin looks like under a microscope:
it’s covered with tiny interlocking teeth that form a one-way-only surface! petting a shark the wrong way will literally make you bleed, which is still never a thing you want to do if you are in the water with a shark.
(yes, those are literally teeth-sharks ended up evolving a skin covering completely separate from the scales that bony fish ran with and they did it by mutating the teeth out of their fucking mouths and over their entire surface area)
they’re colorblind in the truest sense of the word- shark eyes have NO cone cells to work with, only light-sensitive rod cells!Â
so sharks still have excellent vision especially in low-light conditions, but they see the world only as the presence or absence of light with no concept of color.
what we call “black” is a function of being able to process the absence of color, and a shark’s visual experience would be different since it’s coming from a different place altogether. I don’t know if humans would be able to conceptualize how a shark sees the world at all, especially once you throw their electrical sense in there!
I've thought about this a lot and I think I may be close here.
What we see
What sharks see. They'd get a distortion around the fish or other shark because of the electrical field. You can pick up immediately what it is in shape and reflected light from its skin. It stands out compared to the darker background but its not easy to tell exact species. Would also describe why surfers get nipped on boards, sharks thinking they're other animals.
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