Dall porpoise

Dall's porpoise (Phocoenoides dalli) is a black-and-white porpoise found in the temperate and arctic waters of the North Pacific Ocean. It is the largest porpoise species and the only member of its genus. Dall's porpoises are known for being active and gregarious, often riding the bow waves of ships. They typically travel in groups of 2 to 20 and feed on squid and fish. A variation, True's porpoise (P. dalli truei), lacks the distinctive white body patches and is found near Japan. Porpoises, in general, are toothed whales with a compact build, smaller size, and blunt snout compared to dolphins.12