Right whales are three species of large baleen whales of the genus Eubalaena: the North Atlantic right whale (E. glacialis), the North Pacific right whale (E. japonica) and the southern right whale (E. australis). They are classified in the family Balaenidae with the bowhead whale. Right whales have rotund bodies with arching rostrums, V-shaped blowholes and dark gray or black skin. The most distinguishing feature of a right whale is the rough patches of skin on its head which appear white due to parasitism by whale lice. Right whales can grow up to more than long with the maximum record of and weigh up to , significantly larger than other coastal species such as humpbacks, grays, or bryde's, but smaller than blues. Right whales were named by whalers who identified them as the "right" whale to kill on a hunt due to the plentiful oil and baleen they could provide.