I have a breeding pair of jack dempseys in a 40 gallon tank. Recently the male has been boulging in the stomach and everytime I feed him he gets larger and seems more sick. He is app 5" long and I have had him for about 2 years with no problems. He seems like he is struggling breathing, and does not move much at all now that he is getting so large in the stomach. It almost appears as though his rectum or intestines are blocked up. He eats but nothing seems to come out the other end. Its getting worse everyday and tonight i decided not to feed him, im afraid he might explode. I would appreciate any help or suggetions on what I could do to get him better asap. Thanks, Craig