The False Killer Whale (Pseuorca crassidens) is a cetacean and one of the larger members of the oceanic dolphin family (Delphinidae). It lives in temperate and tropical waters throughout the world. As its name implies, the False Killer Whale shares characteristics with the more widely known Orca ("killer whale"). The two species look somewhat similar and, like the orca, the False Killer Whale attacks and kills other cetaceans. However, the two dolphin species are not closely related.