The naked grouper has no tail fin to eat. Can eat, naked spot is a common name in the mouth of southern fishermen. Its scientific name is mirror carp, which is a variety of European carp. Its skin is shiny, smooth as a mirror, and its luster is obvious, so it is called mirror carp. Strong body, flat side, protruding back of head, small head, big eyes, large scales on the body surface, arranged along the edge. There are/kloc-0 rows of complete scales from the front end of dorsal fin to the head, and a few scales can be seen on the lateral line of a few individuals. Most of them live in the middle and lower reaches of the river, but they mainly live in nutrient-rich turbid still water and have the habit of swimming in groups.