The term 'ocean killer' is a reference to the ORCA, also known as the killer whale. Orcas are the largest member of the dolphin family and are found in all oceans around the world. They are apex predators, meaning they have no natural predators, and feed on fish, seals, and even whales. Orcas are highly intelligent and social animals, living in pods and communicating with each other through a variety of vocalizations.