Nattator depressus Flatbacks are only found in Australia. They along with the Kemp's ridley, only found in the west Atlantic are the only sea turtles that don't have global distribtuion. Adults can weigh between 70kg and 200kg, having a shell length between 81cm to 125cm. Only breeds in Australia. Most important nesting sites are in the Gulf of Carpentaria and Torres Strait.
Large rookeries occur on islands off the central Queensland Coast.
A flatback lays approximatley 50 to 90 billiard ball-sized eggs a clutch. Grey above and below with shell plates on back boldly outlined in black. There shell can be between 5.5cm and 6.5cm long. Chelonia Mydas Green turtles are the only true herbivourous sea turtle. Their feeding grounds extend into the Pacific, where they are commonly taken for their meat and eggs.