So I’ve had these 2 oscars for a little over a year now, a few months ago one of them started to get bigger than the other. Yesterday, they just started lip locking and the big one chased the smaller one around for a good 5 mins. When A few scales flew off the smaller one and eventually the bigger one left him alone. They have never been aggressive towards each other before. Does anyone have any thoughts on this, they also seem to do this weird tail shaking thing and every now and then change colors for a quick second. Any advice is helpful thanks.