I have have kept quite a few convicts over the years and I have not had one female that didn't have color on her belly and never had a male that had orange/pink/yellow on it's belly. Females also stay quite abit smaller than males. Go back and buy one with the color on it's belly, it's a female 


you have female convicts now! Another thing...when your male gets bigger it will get the "hump" on his head, your females will not...their body shape doesn't change much when they get bigger.