My jacks are confusing the crap out of me. First off they aren't growing very fast. Second one is basically all black and has only a few visible blue spots. And the other one is growing a little faster and is a lighter color with alot of spots. But I'm having trouble sexing it because the bottom on its mouth seems like a female and male so idk. How big in size do they have to be to properly sex and when do they start breeding and at what size?

