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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.
The scientific name of the killer whale is Orcinus orca, which is the source of their other common name, orca. The name killer whale causes many misconceptions about this noble beast. First, killer whales are not whales at all. They are, in fact, dolphins (the largest dolphins, actually).