Oto catfish with SBD?
 

I think my oto catfish is having a SBD problem. Last time I saw it was last night at like 1 AM and it was fine. This afternoon I came home to a swollen little belly, normal coloring, and on it's side barely swimming around. I isolated it from the tank, and it didn't even freak out when it was in the net. It's still alive, but I don't see it's little underside moving like it should. Anything I can do to help it?

Actually, he died. But I wish I knew what happened. It was so out of no where.

Sorry you lost the little guy, bummer. How long had you had him? How long has the tank been established? Water params?