As mentioned in previous posts i brought a stocked tank several weeks ago and after some homework and help from you guys i now have a good idea as to what i am stocking, I thought I had several Hybrid Yellow labs but from doing some googling to see what sex my Johnanni's are i see the female version is very yellow is there a way to tell the difference between the female johanni and the previously suspected hybrid yellow labs? is there any sure way of telling which of my population if not the hybrid ones are the females to the johannis? was gonna shrink my yellow population in the tank but dont want to take the females away from the males as i have 2 rather large ones thanks