Dugongs

The Dugong, Dugong dugon, is a completely unique species of mammal.  Its closest relatives are the manatees, but it differs from them in many respects.  Dugongs are totally marine, having lost the ability to come on to the land.  They reach 4 m in length and the largest individual recorded weighed about 1000 kg.  A more typical length is 4 m, and a typical weight is 400 kg.  Dugongs are related to elephants and hyraxes.  They are peaceful grazers, feeding on sea grasses in warm, shallow, calm waters in the Indian and Pacific oceans.  Pencil drawing, coloured in Photoshop.