I like to watch the behavior of the fry in my jars right now. 90% boys because I only removed for over aggression. They can all see each other and will take turns flaring and showing off while the others watch with interest. There seems to be very little actual fighting in the 12 wk old mostly girl now fry tanks. They seem to have staked their little area of the tank and will hang out in small groups. They definitely communicate. We stopped using the seperater in the jarred fry tub because the (mostly) boys appear happier seeing each others shows. Betta love to flirt and show off a lot and who can blame them because they are just so awesome.