A lot of and Oscars aggression is to do with breeding. If it's not breeding, it is normally to Oscars who don't like each other. You'll find that nearly every fish in existence will fight at some stage, it is just part of nature
I may not always be right, but I am always the boss
If you can't ignore an insult, top it; if you can't top it, laugh it off; and if you can't laugh it off, it's probably deserved
