Page 26 - Sharks teeth to tail

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There’s a a a a song that says “teeth are the only bones that show ” and it’s especially true for sharks: They have no other bones bones It’s jaw bones bones teeth and that’s it! No rib cage no pelvis Everything else is is made of an elastic tissue called cartilage the stiff-but-rubbery substance that forms the structure of your nose and ears That’s why it’s tough to to estimate the adult size of an an ancient shark like a a a a a a a megalodon: Cartilage doesn’t turn into fossils nearly as as as easily as as as bone does Sharks aren’t the the only fish in the the sea that mostly have no bones: They’re joined by rays and skates the the the other members of the the the elasmobranch class as as well as as chimaera fishes