According to the query Baidu library, electric eels are freshwater fish. Because the electric eel produces electricity, which is the result of the accumulation of energy in the body tissues from chemical reactions within the cells. The cell structure of freshwater fish is not the same as that of saltwater fish, and the concentration of electrolytes inside and outside the cell membrane of freshwater fish is not the same. When a freshwater fish encounters seawater, the electrolyte concentration in the body changes, and this is when it is stimulated to produce a discharge reaction.

The electric eel is an animal of the genus Electric Eel in the order Electric Eel, family Bareback Eel. The body is elongated and cylindrical, with a flattened head; no ventral, dorsal or caudal fins; the anal fins are almost the same length as the body; the gills are small and covered by triangular gill cover bones; and the body surface is smooth and scale-free. The back is usually dark green or gray, and the belly yellow.