Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
Early American humans hunted car-size armadillos and used their shells for houses.
12
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
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