Extreme sexual dimorphism characterizes this species: while the average female weighs approximately 40kg and is 1.2m in length, the average male weighs close to 160kg. and is 1.6m in length. New Zealand fur seals have sharp, elongate snouts and external, visible ears. They are covered by two layers of fur which is actually dark brown, but when wet Arctocephalus forsteri may appear black (Department of Conservation).
Range mass: 30 to 180 kg.
Sexual Dimorphism: male larger