Alot of my males looked like that at 4 inches notice the color in the second pic of rainbow sheen showing and the zig zag markings starting to form on the fins,at this size the females start to become a litte more rounded (chubby)dull lack of zig zag markings with extensive underbelly yellow and not the torpedo shaped body like the one in the picture.my guess would be male.but.hey. ya never know??
After fasting for about a week (only ate few fd shrimps and 2" rd unfortunately ) she/he started excepting pellets. I tried 5-6 different pellets/sticks which didn't work. Now eating NLS sinking pellets . I will post new pics in about a month and then probably we will have a better idea.
Man, it's body could be male, or a skinny female, jaw structure seems to look female, markings look really, really male. I think you may have one of the best looking females i've ever seen for that size.