The leatherback sea turtle is the largest turtle, and the third largest living reptile, in the world.

It’s a docile beast, just swimming around all day and eating jellies, which are the entirety of its diet. And these turtles get so big because they are so well fed.

The evolutionary adaptation for keeping these doomed jellies from floating back out of their mouths during feeding is simply terrifying.

More info on the leatherback sea turtle on Wikipedia.

Via Science Based Life.