Jace Tunnell captured the alligator gar's multiple rows of teeth.

Sure, they look scary, but those 50 rows of teeth are for ... This thrilling deep-sea fish was voted the world's ugliest animal by the Ugly Animal Preservation Society. But its jelly-like skin ...

In the Black Sea it reproduced so prolifically that by 1989 it had reached densities of up to 11 per cubic foot of water. Fish couldn’t compete with the jellies for food—sea walnuts eat as ...

These fish also have venomous spines and can deliver ... and sometimes terrifying nature of ocean life. Above are scary sea ...