Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Denmark has twice as many pigs as there are people.
66
The largest earthworm on record was found in South Africa and measured 22 feet.
151
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132