I have a convict chiclid that I've had since he was small. He has always stayed on the bottom. As in the photos. Maybe no swim bladder? I am unsure but he has never even sick and have had about three years. Recently he had got these sports and they have become larger. They appear to be clear live his skin and flesh color have disappeared and turned clear. Water is fine. 75 gallon. Just a couple plecs. Any information would be appreciated. 
