Dugongs are giant vegetarians that reside in the warmer coastal waters that range from East Africa to Australia. Their closest relative is the manatee; they are similar in appearance and behavior, even though the dugong's tail resembles that of a whale. Both dugongs and manatees are related to the elephant, even though neither have its same appearance or behavior. Dugongs can stay underwater for six minutes at a time, and sometimes "stand" up to breathe on their tail with their heads above water.Bonus Fact: These animals are said to have inspired ancient stories of mermaids and sirens.