Dugong (Dugong, Sea Cow) is a mammal (# Sirenia) only one type of plant-eating, when Christopher Columbus first saw it in the sea. He thought it was a mermaid because it has an "identical" sausage-like fissure of lip, it has a feather up sporadic. The eyes are small and the tail fin is like a fish, it does not have the ears and body length ranging from 2.5-4.5 meters, dugongs are most troubling may be heavy to 100 kg.