Dugong

Male and female dugongs are generally similar in external appearance, but the tusks are clearly visible through the skin in mature males and only in older females.

The dugong has a tail made of two lobes that separate at the rear end, unlike the rounded, paddle-like tail of manatees. It has two short front flippers, no dorsal fin, and a downward-pointing snout that helps it graze on seagrass.