Dugongs are large grey mammals that live exclusively in the sea. They can grow up to 3 meters long and weigh 400 kilograms. Dugongs have nostrils near the top of their snouts and swim using an up and down tail motion and two flippers. They are found in warm, shallow seas near Australia and other parts of the Indian and Pacific Oceans where sea grass grows. Dugongs only surface to breathe and never come onto land. They graze solely on sea grasses and are slow-moving with few defenses against predators.