okay my friend is having problems with his two large Oscars the he recently got from the lfs and they were in the same tank together when he got them and now they are fighting and one of them is attacking the other one and he doesn't know why they are doing this because they were raised together and he doesn't know what he should do any suggestions on what he should do because i dont know what to tell him and he is confused on what to do so can you guys please help me out thanks btw they are tiger oscars they are about 9-10 inches and also they live peacefully with two other catfish
