Leatherback turtles are the only turtle species without a hard carapace. They can grow up to 750 kg and can live for over 100 years. Not only are leatherbacks the fastest-moving turtles in the world, but they are also the deepest-diving, reaching depths of 1.5 km. Leatherbacks feed solely on jellyfish and nest in KwaZulu Natal. They are vulnerable and declining in number.