When cats are happy, they may squeeze their eyes shut.
10
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The cat brain weighs about 30g.
167
The head of a jellyfish is called the "Bell."
6
Two dogs were among the Titanic survivors.
262