I came home from work today and dropped in some beef heart into my tank with my gold saum and senegal in it. I went around, fed the other tanks and came back and saw my sen thrashing about. First I thought he was choking, hes gasping and thrashing around, then he stops. First thing I notice is that only half of his dorsal fins are up and he doesn't seem to be using his rear fins or tail to propel himself. Did he somehow become paralyzed? I moved him out of the 55 into an occupied hospital tank to better keep an eye on him. I don't see any damage visible except for a small spot on his slime coat that the pleco may have done (fixing to be rid of said pleco). Any suggestions? He was my first and my favorite, I hate to think of losing him.