The bowhead whale (Balaena mysticetus) is a species of the right whale family Balaenidae, in suborder Mysticeti, and genus Balaena. A stocky dark-colored whale without a dorsal fin, it can grow to in length. This thick-bodied species can weigh from to . They live entirely in fertile Arctic and sub-Arctic waters, unlike other whales that migrate to low latitude waters to feed or reproduce. The bowhead was also known as the Greenland right whale or Arctic whale. American whalemen called them the steeple-top, polar whale, or Russia or Russian whale. The bowhead has the largest mouth of any animal.