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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Moths are unable to fly during an earthquake.
328