I have a 30 gallon with 6 black cons and an orange chichlid,alos in the tank two river catfish two striped cats under 1 1/2 inches combined and a shark,also a pocotmous.I have always wanted to breed fish.I was wondering how do i tell what are females and males and my biggest con and the orange chich chase every fish away from the right corner,but are nice to each other and suggestion on how to breed em.