Leopard Seal's very strong, sharp teeth to grip and tear their prey such as penguins or fur seals. Thick layer of blubber (up to 9cm thick in winter). The blubber helps insulate against the cold water and adds buoyancy to help the seal swim. Streamlined body shape for efficient swimming.Successful hunters using a stalking technique before lunging at their prey. Strong jaws which they can open very wide. This allows them to bite and seriously injure their prey when hunting.