its in a 220 gallon, it is aggressive just not nearly has nuts as the midas i gave to mojo. its colors are getting more vivid instead of fading with age, mostly the blue color on the lips and the edges of all the finnage. my friend has 4 of them all adults and none of them lost the colors as they got older like it is believed to happen. I dont think it has anything to do with being dominant because it shared a tank with a very dominant male midas, a female midas, and a mayan cichlid. Now its sharing the 220 with just a carpinte and a bunch of various bottom feeders, and soon a female festae. Im waiting for the day its attitude does a 180 and it goes phsyco, but so far so good.