Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Cats recognise the voice of their owner, but never evolved to care.
22
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
Dogs sometimes fake being sick to get attention.
26
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
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
The largest earthworm on record was found in South Africa and measured 22 feet.
151