Leatherback Sea Turtle (Dermochelys coriacea)
This is the world's largest turtle. It can be more than 6 feet (1.8 meters) long and weigh as much as 1,400 pounds (636 kilograms)! It’s also the only sea turtle with a soft, rubbery shell. (Most others have hard, bony-plated shells).
It has special adaptations that allow it to eliminate waste gases through its skin, so it can stay under water for extraordinarily long periods. Its body is also insulated by a thick layer of fat—another adaptation that is unique among turtles to leatherbacks.
Photo: Hans Hillewaert, CC BY-NC-ND 2.0, flickr
via: American Museum of Natural History
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