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.