i agree, both are pretty colorful...but my male turns all kinds of crazy colors, especially when he is excited/pissed about something...males do tend to be more colorful though, given that they are the same kind of FH. plus i like the hump and super long fins that males have. but i've seen dull flowerhorns with drab colors at 3in, turn into multi colored, fin shredding, guppy eating, aggro monsters, when they get to around 5in. and up (like mine)...guess like alot of cics, they get more colorful with age...when FH are small, i can't tell if it's a male or female.