I recently added a 2" Oscar to my tank.. when i got him from my LFS, his fins and tail where a little nicked up (typical) , day one he ate alittle and chased around a little.. now day 2 i notice his fins/tail looking alittle more beat up , as well as 1 of his fins being clamped and he just hanging around at the top of the tank.. i took him out of my big tank and put him in my smaller one, (much less aggressive fish) hoping the fin clamp is just part of stress and nothing more.. i dont see any white spots or anything..