Ok i have a community tank of malawi various types yellow labs, red top trewavasae,albino yellow labs etc. I have a yellow lab who has been dominate the whole time i have had him and all the fish use to bow down to him when he passed by them even tho he never really attacked them. He us to always display black bars and dark yellow color, now he is bright yellow and hangin in the top of the tank in one corner I see my red top who use to be smaller then him chasing him around the tank once in awhile, my red top has started to chase all the cichlid around in the tank, why has he turned like this he was a baby when i put him in there with all the other fish but has turned on them. He is nipping the tail of only my yellow lab and they are both male all other fish are female, lab also is bigger then him not by much tho. What can i do to curb him down