Archelon (SciiFii)

The great sea turtle (Archelon marinus) is a species of marine turtle that originally lived from the Late Cretaceous in what is now North America as an extinct species, Archelon ischyros, and was once extinct, but has since been brought back from extinction and introduced throughout the world's oceans to help boost biodiversity. The great sea turtle is the largest turtle ever to have been documented, with the biggest specimen measuring 460 cm (15 ft) from head to tail, 400 cm (13 ft) from flipper to flipper, and 2,200 kg (4,900 lb) in weight. Like the completely unrelated leatherback sea turtle, the great sea turtle has a leathery carapace instead of the hard shell seen in most sea turtles. The carapace features a row of small ridges each peaking at 2.5 or 5 cm (1 or 2 in) in height. It has an especially hooked beak and its jaws are adept at crushing its main food sources, including the hard-shelled crustaceans and mollusks, while the great sea turtle moves slowly over the seafloor, however, its beak is strong and the great sea turtle is adapted for occasionally shearing flesh. The great sea turtle is able to produce powerful strokes necessary for open-ocean travel. Behavior-wise, it is very similar to the native modern sea turtles in locomotion, solitary lifestyle, and reproduction. The conservation status of the great sea turtle is Least Concern due to successful conservation efforts and the great sea turtle's wide range.