I'm not sure what's wrong. My husband is the primary goldfish person in our family and he is at work. His Joaquin (that he looked for for months to find) is floating on his side. Last night when I fed the fish he occasionally did a somersault-type move but at the time looked more like swimming under the other fish to get more food. Today he is on his side w/ his tail hanging down. I moved him out of the tank and put him in a bucket w/ a bubbler to keep oxygen going and gave him stress-coat and something-fix that my husband told me to put in there (sorry, I forget the name right now and it's on the other side of the house). Is there anything else I can do. Is it possible for him to recover? All the other fish seem fine.