Hello all. I have a 55 gallon tank that's a little over 5 months old pictured below. It currently has 12 Peppered Corys, 12 Harlequin Rasboras, 1 Bolivian Ram, 1 Rio-Negro Pleco and 7 Keyhole Cichlids. I order my fish online so I usually order one or two more fish than I actually want in case they don't survive shipping. I ordered 7 Keyhole Cichlids, all of which survived so I'm kind of pushing my limit on the amount of Keyholes that should be in a 55 considering the rest of my stocking as well. When I first got them 2 months ago they were juvenile and got along great. For the last month or so they have been bickering among each other more often, chasing each other around more often and nipping each other causing minor scale damage occasionally. It's not constant fighting, 60%-70% of the time they get along fine. I'm assuming they're maturing now and figuring out a pecking order. Is this a temporary phase or will this aggression be permanent? I haven't noticed any spawning behavior yet. As far as I can tell so far I think I either have 4 males, 3 females or 5 males, 2 females. I'm not quite sure yet.