Dugong

Description: The dugong (/ˈdjuːɡɒŋ/; Dugong dugon) is a medium-sized marine mammal. It is one of four living species of the order Sirenia, which also includes three species of manatees. It is the only living representative of the once-diverse family Dugongidae; its closest modern relative, Steller's sea cow (Hydrodamalis gigas), was hunted to extinction in the 18th century. The dugong is the only strictly herbivorous marine mammal. The northern waters of Australia between Shark Bay and Moreton Bay are believed to be the dugong's contemporary stronghold.