dugong
noun [ C ] uk/ˈdjuː.ɡɒŋ/ us/ˈduːɡɑːŋ/ dugong or dugongs
儒艮（一种生长在太平洋里的大型哺乳動物，类似海牛）
a large sea animal, similar to a manatee, that is found mainly in the Indian and Pacific oceans. It has thick skin, a divided fin at the back end of its body, and two flippers (= flat parts for swimming) at the front.