Lobsters have blue blood.
476
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
Cats sleep for 70% of their lives.
8
Bats sleep 18-20 hours per day.
5
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109