Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
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
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14