This disease is characterised by a swollen or hollow abdomen (Ascites). A concentration of fluid in the body tissues and cavities causes the fish's abdomen to become swollen and appear bloated. Swollen areas may exhibit a 'pine-cone' appearance caused by the fish's scales sticking out. You can best see this by viewing your fish from the top. Fish may also stop feeding, appear off-colour, become listless and/or lethargic, have sunken eyes, and hang at the top or stay at the bottom of the aquarium. The condition affects the fish's internal organs, ceasing proper function.