For anyone that may think that he has gill curl, as I've already gotten the misinformed accusation on another board, it's not gill curl. About 6 months ago we placed an emergency divider in his tank for another fish and he freaked out and cut himself up pretty bad. In the process his gill plates were ripped wide open and they're finally growing back, though scarred. When it happened we thought we were going to lose him. All the skin around his gills sloughed off then scabbed over finally to reveal what you see now. The gill covers you see now are not curling at all, but grew back thicker than before and the transparent membrane hasn't grown back fully yet. He'll most likely be scarred for life, but at least he's healthy.