Largest of the porpoises, the killer whale, or orca, is a highly successful predator, feeding on fish, seals, and sometimes whales.

• 意译：最大的小鲸，杀人鲸或逆戟鲸，是一条高效率成功的掠食者，吃鱼类，海豹和有时是鲸鱼。