My severum is not acting like himself at all the last few days. I have not seen him eat (he normally goes crazy over food) and he is acting very sedentary. He barely moves around and just floats by the bottom of the tank, and sometimes floats almost sideways. The water quality is fine and all the other fish in the tank are lively and happy. If anyone has any idea of what is going on with my severum it would be greatly appreciated.