Scales appear to stand on end, and fish looks bloated. This may be signs of an intestinal infection. Fish cannot swim below the surface without exertion, and many stay in upright position. Bacteria invades portions of the fish's body, and then collects in areas. Collects behind the eyes and pops them forward.
Fish quickly dies.
Condition may be caused by Turbuculosis, or high acidity in water. 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.