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Orcas are called killer whales due to the fact that they are the top predator in the ocean. They are the hunters, not the hunted. They eat almost anything and everything they â¦ can find including other whales.hey are known to eat fish, squid, seals, sea lions, penguins, and even other whales, such as sperm whales. There are no reports of whale attacks on humans in the wild, although some have be known to happen in captive situations.
Despite their prevalence in marine parks (think SeaWorld), killer whales (more politely called orcas) are a wide-ranging cetacean species in the wild. Learn more about where killer whales live. Answer: Killer whales are found in all the world's oceans.In fact, the Encyclopedia of Marine Mammals states that they are second only to humans as the most widely distributed mammal in the world..reas where killer whales have been well-studied include: 1  The Southern Ocean around Antarctica. 2  The Pacific Northwest (where salmon-eating resident orcas, mammal-eating transient orcas and shark-eating offshore orcas have been identified).