Hello I am New to the forum. I have 2 tanks right now. A catfish, parrot cichlid, placo, and albino Oscar in one a cichlid 2 Oscars and a placo in the other. We havd kept tanks since I was a baby I love then and so do all the kids. Anyways My question is. One of our Oscars has recently Gotten fat and there is a Huge indent in her stomach and she has Gotten extremely aggressive. Enough to where to other fish in the tank accept the placo. Completely avoid her and run when she appears around then. They are actually Marked up from her attacking then and I always catch her trying to lock jaws with the others. I got pictures but idk how to post them. I am very concerned.thank u.