Any of several large, usually black dolphins of the genus Globicephala, having an outward-curving globular forehead and noted for their occasional mass strandings. Also called blackfish, pothead whale. a small whale with black skin. Any of one to three species (genus Globicephala, family Delphinidae) of toothed whale found in all oceans except the Arctic and Antarctic, also called caa'ing whale for a roaring sound it makes when stranded. It is black, usually with a lighter splash on the throat and chest, and has a round, bulging forehead, a short beaklike snout, and slender, pointed flippers, and grows to 13-20 ft (4-6 m) long. Pilot whales live in large schools, sometimes hundreds or thousands, feeding mainly on squid. They have been kept in oceanariums and trained to perform
small dark-colored whale of the Atlantic coast of the United States; the largest male acts as pilot or leader for the school