Balaenidae
There are four species in this family. They are found in the cold and temperate waters of the Northern and Southern Hemispheres. They are large baleen whales with a bow-shaped lower jaw and a large head that is up to one third of their total length. They are black with white patches and have a scattering of hair on their lower and upper jaw. They have two blowholes, rounded front fins, and a thick layer of blubber. They filter feed on krill, plankton, and other small ocean creatures.