I really like the electric blue coloring on the male Hap Ahlis..I was considering buying a very small male (2 inches) at my lfs. My tank is about 4 feet long and has two male peacocks and one female..the dominant and biggest peacock in the tank right now is about 4-5 inches. I've heard to never mix these species as the Ahli is much more aggressive and will kill all the males..I've also heard and seen that they can co-exist with one another. please give me some input.