Ross seals are seldom observed, very little is known about them. They feed mostly on squid and fish. No known predators. Sea birds Skuas are both predators and scavengers. The skuas distract the parent penguins, then disembowel the living chicks with sharp, hooked beaks.
Snow petrels feed on zooplankton in polynya s and sometimes on food regurgitated by penguins.
A large variety of birds frequently visit the Antarctic. Many prey on krill , fish, and squid. Whales Orcas feed on penguins, seals, and fish near the surface. Also known as 'killer whales', they occasionally attack other whales such as sperm whales. Sperm whales feed on fish and squid in deep water.