porpoise

n. Sea mammal of the whale family, with a blunt rounded snout. [latin porcus pig, piscis fish]

n. Any small cetacean of the genus Phocaena, especially P. communis, or P. phocaena, of Europe, and the closely allied American species (P. Americana). The color is dusky or blackish above, paler beneath. They are closely allied to the dolphins, but have a shorter snout. Called also harbor porpoise, herring hag, puffing pig, and snuffer.