Red skin disease. Erythroderma is caused by Trichobacterium fluorescens. After suffering from red skin disease, the body of the double-point hanger dropped significantly, with loss of appetite, slow movement, and outliers swimming alone on the water. The surface of the fish is bleeding and inflamed, and the scales fall off. The scales on the sides and abdomen of the fish are the most serious. Bloody gills. The fin rays are rotten. In severe cases, the skin of the operculum rots and falls off, the operculum is transparent, and it can die in about a week.

Soak with 20ppm potassium permanganate solution Fish and fish tank, or soaking fish and fish tank with 3 parts per million bleach solution, can play a role in disinfection and sterilization.