This little one is 4 months old and aggressive and territorial and im thinking its a HE but the tiny white dot on the tummy does make me second guess myself so maybe someone elses eyes are better. The girl in the background is his/her mother, i wanrted to see if he/she reacted to her and he/she did wiggle dance like his dad at one point (at the surface) but i didnt get that wiggle on video. http://www.facebook.com/v/2369797609639
Looks female to me, but if they're still young it can be harder to tell. I can't watch the video at the moment, my internet is acting up. I've never sexed based on ventrals(mostly because my very first spawn the parents didn't have ventral fins because the breeder over fed microworms and I had nothing to compair to).
You'll find out in time i suppose xD Since neither parent was a PK his/her find will grow out if its a male.