Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Sharks, like other fish, have their reproductive organs in their chests.
248
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Sloths take two weeks to digest their food.
243