Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Female kangaroos have three vaginas.
2
A dork is a whale's penis.
327
Sharks have been on the planet longer than trees.
14
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9