Dugong taxonomically belongs to the Dugong family of mammalian manatees. Dugong is often half-naked on the water, holding her young to breastfeed. When breast-feeding, dugong's body is vertical, with its head and chest above the water. It holds its young with its forelimbs and floats in the water like a human, so it is called "mermaid".
There are records about mermaids in ancient books at home and abroad. Zheng Chang's Qia Wen Ji in the Tang Dynasty said: "Sea people are like fish, with eyes, nose, mouth and claws. They are all beautiful women, their skin is as white as jade, their hair is ponytail, and they are five or six feet long. "
In the ancestral story of the Song Dynasty, it is recorded that in Song Taizong, a man named Tea Ceremony went to North Korea (now North Korea) and saw a "woman" appearing on the sea. "The red skirt is bare, the bun is messy, and the cheeks are reddish." Living in water, if you can't feel love, it is a mermaid. "
More than 2,300 years ago, Babylonian historian Barosso wrote in his book History of Past Dynasties that a mermaid was like a fish with a pair of human-like feet on her tail.