I have a lot of the sulphurheads. They are F1 and I can see males. One dominant showing in each group. I have a group of mediums around 1.5" to 2" and the smalls are around 1" maybe bigger. Each group has at least one male. I would say I have like 40 total maybe more. I have a tank with 3 Kandeense females it looks like. I am also toying with the idea of selling my wild subdominant male.