The term 'large marine mammal' can refer to two different animals: the manatee and the WHALE. The manatee is a large, herbivorous aquatic mammal that lives in shallow coastal waters and rivers of the tropics and subtropics. It has a large, paddle-shaped tail and flippers and can grow up to 13 feet long and weigh up to 1, 300 pounds. The WHALE is a large, carnivorous aquatic mammal that lives in oceans around the world. It has a streamlined body and a blowhole on the top of its head and can grow up to 100 feet long and weigh up to 200 tons. Both the manatee and the WHALE are important species in their respective ecosystems and are protected by international conservation laws.