USS Grampus (SS-4), a Plunger-class submarine later named A-3, was the fourth ship of the United States Navy to be named for two members of the dolphin family (Delphinidae): Grampus griseus, also known as Risso's dolphin, and Orcinus orca, also known as the killer whale. Dismantled and used as a target by ships of the Asiatic Fleet, A-3 was struck from the Naval Vessel Register on 16 January 1922.