I can home to find my foxface has a bubble on one eye. He is for sure 3 years old maybe older he can with the tank and i am not sure how long the other people had him. this tank is set up at my house a little over 3 years. The water leavels are great, I have not changed his food. No one picks on him he rules the tank most of the time. Could this be that he has gotten hurt or could it be something wrong. I do not have pic. so i can not show you, but if you could need help.