Eel is the meat or whole of eel in the family Anguilla. Eel is a kind of fish. It looks like a snake, but it has no scales. It is usually found in the waters bordering fresh water in Yuxian County. Mainly distributed in China Yangtze River, Minjiang River, Pearl River Basin, Hainan Island and rivers and lakes. There are 18 species of eels in the world, among which there are four families of Japanese eel, perch eel, Celebes eel and short fin eel in Taiwan Province Province, but only Japanese eel has the largest number, and the other three are rare. They have lived on the earth for tens of millions of years, but our understanding of them is only in recent decades. For example, its real spawning ground was found in 199 1 year. Its sex was initially controlled by environmental factors and density. If the density is high and the food is insufficient, it will become a male fish, and vice versa. In the rivers of Taiwan Province Province, because the number of eels is very small, most of them are female.