The Leopard Seal (Hydrurga leptonyx), also referred to as the sea leopard, is a species of seal from the seas and ice flows of Antarctica and the second largest species of seal in the Antarctic, after the southern elephant seal. It is second only to the killer whale (its only natural predator) as the top predator in Antarctica. It is the only species in the genus Hydrurga. Its closest relatives are the Ross seal, the crabeater seal and the Weddell seal, which together are known as the tribe of L