... thought it was swim bladder disease, so i tried to feed him separately from the other 3 goldfish and gave him peas occasionally. But this past week, he is always on his side or upside down, and cant seem to swim down very far without having the air in his stomach bring him back up. Just now, I went to check up on him, and I found 2 red spots on him. It wasn't there an hour ago....what's wrong with him?