Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Cats lose almost as much fluid in the saliva while grooming themselves as they do through urination!
205