This description is about the Dugong, an endangered species found in the Indian Ocean. The Dugong is a gentle giant, with its large size and slow movements. It is a herbivore, feeding on seagrass and other vegetation. It is an important species
From Wikipedia
The dugong is a 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, was hunted to extinction in the 18th century.