Recently I have found that my "pair" of Oscars have decided not to get along. The smaller of the two (8") still seems to like the big one, trying to cuddle an dhang out like they always have, but the larger of the two (11") has recently started bothering the smaller one. Not the usual bullying that I have witnessed, but violent attacks. Flaring the gills, biting, ripping at fins and tearing scales away. The two reside, well, used to, in a 75G tank and I have recently had to seperate them because of the damage caused by the larger one. Have other oscar keepers out there ran in to almost murderous aggression? Could one want to breed while the other is too young? Perhaps they are the same sex, but my attempts to vent them have led me to believe that the larger one is a female and the younger, smaller one is a male. Anyway, I thought I'd get some input from others.