I added a 2nd percula clown to my tank today and had a couple questions. It's a little larger than my original clown and is being pretty aggressive. How long should I expect this to last? And, oddly, the new larger one is twitching. I've been reading that that is how they decide who's dominant but, shouldn't it be the smaller one doing this? I would hate to lose my original one, he was my first fish and a misbar, at that. Any help is appreciated.