Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
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
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14