I was away for two weeks and upon my return one of my gold wolffish had several fungus-like growths on his body. Approx. a week and a half before I left I noticed one of them forming so I turned up the heat and added some salt and melafix. It looked like the growth was going away before I left but when I got back it was worse. He was in with 2 other gold wolffish, 1 rainbow wolffish and 2 bichirs. None of them have any of his symptoms. He is currently by himself in a hospital tank being treated. Does anyone know what these growths are?