Over the last 7-10 days, my platy has developed a very swollen abdomen. He is not constipated or acting strange. He seems happy, alert, and is eating well. I am quite concerned however. I imagine it is dropsy, but I have no idea what the cause is (parasites, infection, tumor). We do not have a hospital tank at this time. Please see my gallery for photos of him that were taken before this developed, for comparison purposes. Any ideas or suggestions would be greatly appreciated.