we have 2 platys in our 200L community tank, which when we purchased them, over a month ago we thought one male one female, however in last week or so we have become suspicious that they both males, now a bit bigger and easier to sex. we have swordtails as well, and one we are pretty sure is pregnant, from the activity we have had it would seem a platy is the father!!! just today the two platys are really having a go at each other, tying themselves up in circles, nipping tails and sides of bodies. have seperated them and put one in the guppy trap for a while to let them cool off. are they fighting or perhaps we are sexing them wrong and mating? if we put them back together will they kill each other or happily sort it out between them? naughty platys seem very growly!!!