The first thing about the difference is how they look, A lot of people get them mixed up between the two. A Dugongs tail is similar to a whale’s tail but a manatee’s is like a boat paddle. A Dugong’s body looks more like a seal but a manatee just looks like a grey sausage roll with a tail and a mouth. A Manatee’s skin is quite rough but a Dugong’s skin is very smooth.
A Manatee’s Weight is about 440 to 1,300 LBS but a Dugong’s is 510 to 1100 LBS.
Also usually a Manatee is alone when he is in the ocean but a Dugong is normally in a herd.