View source for Orca (Orcinus orca)

{{Project species box 2}}[[File:Type C Orcas 2.jpg|alt=Orca in the Ross Sea|thumb|Orca in the Ross Sea]]The '''orca (''Orcinus orca'')''', also known as the killer whale, is the largest member of the dolphin family and the top predator in the ocean. They are found in all oceans, from the polar regions to the tropics, and have a varied diet and culture depending on their population and ecotype. Some populations of killer whales are endangered or depleted due to human activities, such as hunting, overfishing, pollution, and noise disturbance.