Any of several gregarious toothed whales of the genus Phocaena and related genera,of oceanic waters,characteristically having a blunt snout and a triangular dorsal fin.

• 鼠海豚一种鼠海豚属小型群集齿鲸，其共同特点是生活于海洋中，生有钝圆白的吻部以及三角形的背鳍。