This disease is very slow, and the fish does not waste away. This disease shows few symptoms, resulting in the death of numerous fish. Does not spread through the tank. The threads may or may not grow an eighth of an inch long, before the fish brushes them off. Grayish or whitish areas appear on tail.
Gills appear redder than normal, and the gill covers, stand out so that the gills are visible.
Disease progresses slowly in mature fish, but kills small fry very quickly. A small white area, seems to prevent the fish from closing its mouth. The entire mouth fills with a spongy-looking growth, and the fish dies. Fish hangs near the surface even if the tank is well aerated. Saprolegnia Resides on the body of the fish.