The octopus does not have a blind spot.
273
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
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