i have a large gold severum in my 180 the other day he was fine ....yesterday while doing a water change i noticed his lips and mouth were either swollen or infected there is no puss or anything growing on him , just the swoolen mouth . it looks like he can open his mouth but not like the other severums can ,somethings wrong was he in a fight ? i know the severums "jaw " at each other at times , any advice from anybody , i dont want him to be sick not treat him and die 
thanks
thanks
