It is gonna be different sexes more than likely but I don't think they fry will survive anyways in the big tank as there is not a whole lot of cover. I have a spawning tank going with my high fin platies and by the time I get fry from them my other fry will probably be mature enough to go into the 55gal. If I decide I want to take the platies that I put in the 55gal out, I will move the females to the tank of their own to run out their current pregnancy and then put them in the spawn tank with the male I choose to breed them with. It might take a little while for this plan to start out but I will post pics once the fry have grown up and are in the 55.