I just added another clown to my tank today... i wonder if it is the opposite --- of my other clown... I have no way of knowing it.. so far they are interacting the way i'd expect.. first hostility, with head butting, then weird vertical twitching (can someone explain that to me??) now they are cruzzing the tank together.. the older bigger one is showing the newer one the ropes too... Any chance they could mate?? Any suggestions?? Thanks..