The Australasian Gannet - Morus serrator - has a white body with black tail feathers, grey beak and yellow head and pale yellow neck. The amount of black in tail feathers varies. Straight, tapered wings are mainly white with black trailing edge and outer section from above and below. Black feet with green lines on toes. Males and females similar, juveniles are grey-brown, spotted white above and white underneath. From 84 to 91 centimetres long, wingspan 1.7 to 1.9 metres.
Hunts by plunge-diving onto schools of fish from 20 to 30 metres with wings half-folded. Gregarious species, flying in lines of birds low over the water or gathering in floating 'rafts' on the surface.
Lives in marine environments along continental shelf waters. Prefers seas near islands, capes and channels; enters estuaries and bays to shelter from rough sea.