The leatherback sea turtle (_Dermochelys coriacea_) is the largest sea turtle species and one of the largest living reptiles, with adults reaching up to 7 feet (2.2 meters) in length and weighing up to 2,000 pounds (900 kilograms). Leatherbacks are distinguished by their unique leathery carapace, which lacks the hard scutes found in other sea turtles. Their carapace is dark grayish-black with white or pink spots, and it is covered in seven prominent ridges that run lengthwise.
The leatherback's head is large and triangular, with a powerful jaw that is well-suited for feeding on jellyfish. Their flippers are long and paddle-like, allowing them to swim long distances in open water. Leatherbacks are also known for their impressive migratory behavior, traveling thousands of miles across the world's oceans.