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
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27
The head of a jellyfish is called the "Bell."
6
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
The Basenji dog is the only dog that is not able to bark.
4
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23