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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.
Meanwhile, killer whales, also called orcas, are not actually whales, but dolphins. âAnimal activists claim they are too intelligent, too socially dependent on their families and just too big for captivity.â But these animals in captivity has taught scientists more than was known before about them and problems in the ocean. âOne of the ironies in all of this is the fact that prior to parks like SeaWorld, these creatures were considered by many people to be monsters; we knew so little about them,â Savidge says.