i also have found that when starting out a breeding pair, dividers are almost always needed, many of my females scrap and scrap at males, to make sure there ready for breeding, but it can get somewhat dangeous to the males as there scars can get pretty deep, after about 2-3 succesful spawns they mellow out at eachother though, and foucus on killing anything near they fry., i've had some funny momments in which my o would be eat fry as they swam close to him, and then sorta give the jaguars a look like he isn't doing anything, and goes back to his eating, until the pair puts an end to that.