Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Sharks, like other fish, have their reproductive organs in their chests.
248
A dork is a whale's penis.
327
Dogs sometimes fake being sick to get attention.
26
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