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-SaC t1_jdhgcav wrote

Reply to comment by cubanesis in TIL Sharks don’t have bones. by akunis

The jaws are still cartilage. They calcify over time, making them solid and dense, but it's still cartilage.

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cubanesis t1_jdhl0zz wrote

Hmm. Good to know. I was told when I was a kid the jaw was the only bone and that is why there are no megalodon fossils other than the jaws.

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wagnus_ t1_jdhnfip wrote

their teeth aren't bones?!

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-SaC t1_jdhnvu1 wrote

Closest things to it that they have, albeit an ectodermal organ. Teeth aren't bones as (for simplicity) they can't heal themselves, unlike our skelingtons.

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