+1 on the how to sex them, here are some month old pics of my babies from when i first got them, i will try to get newer pics, they are about 2-3in in these pics and are the most aggressive fish in my tank they keep the others well exercised from having to run away from them lol
Root that pair is sweet they remind me of the first pair I ever had with big beefy female, since then the females have been much smaller than the males.