The Australian Marine Mammal is the DUGONG, a large marine mammal that lives in the shallow coastal waters of the Indian and Pacific Oceans. It is the only living species of the family Dugongidae and is the only strictly herbivorous marine mammal. The DUGONG is easily recognizable by its large, paddle-like tail and flippers. It is an important part of the marine ecosystem, as it helps to maintain seagrass beds by grazing on them.