I have a 10-gallon freshwater tank with a pair of honey gouramis (also five neon tetras, two otos, a flying fox and until recently, a shrimp that came along as a rider from the fish store, but he apparently ran out of life span or became dinner for somefish). The female gourami has suddenly developed a lump on her left side near her tail and is spending most of her time laying on the gravel under a plant. Once in awhile she goes up for air. Does anyone have any ideas on what might be wrong with her? Thanks!:help: 
