They can grow to over 11 feet long and weigh up to 800 pounds. Usually, leopard seals are solitary animals. Actually, these seals eat a wide variety of foods. Penguins are only a portion of their diet. Ross seals are fairly rare, and they are the most recently discovered pinniped.
Pinnipeds are carnivorous mammals in which all four limbs have been modified into flippers.
Captain James Clark Ross first discovered Ross seals during the British Antarctic Expedition of 1839-43. Ross seals average about six to seven feet in length and weigh around 400 pounds. They live only in deep pack ice, and they are known as solitary animals. Not very much is known about them, but scientists believe that squid make up most of their diet, with fish and krill making up the remaining portion. The last type of seal is the Weddell seal .