That makes sense but I bought this alone and it started out black when it was little / these are images from 6 months agoAlso about sexing all my males I believe have a pointed sex organ and my females have nothing I can see and if I do it's barely there. I usually can distinguish males from females from growth rate.
I have 6 Midas/ red devil mix and two are 1.5 inch and the others are 5-6 inches. I just already assume the bigger ones are males. Same batch and diet.

