The flat backed turtle is a species of sea turtle unique to Australia. Among sea turtles, only the hatchlings of flat backed turtles live in coastal waters and do not swim into the ocean, which is why they are unique to Australia. The flat backed turtle shell can grow up to 1 meter long and weigh up to 80 kilograms. The back shell is flat and circular, with a gray olive color and a brownish yellow edge. The edge shield has a thin layer of wax. Flat backed turtles are omnivorous turtles with a preference for meat, mainly feeding on mollusks. The flatback turtle is a CITES Class I protected animal under the Washington Convention.

It is an amphibian with a tail order and a family of hidden gill salamanders. It is an aquatic and nocturnal amphibian, the world's second largest baby fish with a large body size. The male has a total length of 627.5 millimeters and the female has a length of 665.1 millimeters. The head is large and flat, slightly longer than the width, with a blunt and rounded snout slightly protruding from the lower jaw; The nostrils are small and very close to the tip of the kiss; Small eyes without eyelids, large cleft mouth, and obvious lip folds at the corners of the mouth. The Chinese giant salamander and the Japanese giant salamander have very similar body shapes, with the main difference being that the former has small and regularly arranged warts on their heads, while the latter has large and irregularly arranged warts.