hamfist;4402329; said:Red-spotted gold's are notoriously difficult to sex. You just cannot do it on face markings like with greens.
They are too young to tell by just looking at them.
A surefire way of doing it (although I have never done this), according to some is to hold the fish in you hand and squeeze the abdomen just in front of the ventral/anal opening. A male will squirt out some clear fluid, whereas a female will not. Hopefully someone who has actually done this will chime in with better detail.