The bowhead whale (Balaena mysticetus) is an Arctic baleen whale, a right whale with a large, bow-shaped head that is up to 40% of its body length. The arched mouth is up to 10 feet (3 m) wide and 20 feet (6 m) deep. The eyes are very small and lips are huge. Bowheads live in pods, are rich in blubber (a subcutaneous layer 20-inch (50 cm) thick in places), and have 2 blowholes.