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posted by Jason Kottke  ·  gift link  ·  via themorningnews.org

There’s a shark called the cookiecutter shark because it leaves bite marks the shape of “neat, circular holes resembling the cut of a cookie cutter”.

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M
Moira

Unlike other sharks, the cookiecutter’s teeth are actually a single unit, so the shark sheds all its teeth at once. Then it eats the teeth (or tooth?) it just lost, which researchers believe helps it maintain calcium levels.

How does it eat a giant mega tooth when it no longer has teeth/tooth? Also: ow?

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