Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
In Australia, there are spiders big enough to eat snakes.
20
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9