leatherback sea turtle

The leatherback is the world's largest turtle. Unlike the bony exterior of other sea turtles, the exterior of the leatherback's shell is rubbery, because the bones are under the skin. They enjoy snacking on jellyfish and seaweed. Because people have been building houses on the beaches where leatherbacks nest, they have been on the Endangered Species List since 1970.

Image credits: main image, courtesy of AMNH, Hall of Reptiles.