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Orcas (Orcinus orca) are often called killer whales, even though they almost never attack humans. In fact, the killer whale name was originally “whale killer,” as ancient sailors saw them hunting in groups to take down large whales, according to Whale and Dolphin Conservation (WDC)

Today, orcas are recognized as among the most widely distributed mammals on the planet, occupying every ocean. They are incredibly social, diverse and ferocious marine predators with a diet ranging from penguins to great white sharks.  

How big is an orca?

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