I've got a 20 gal high community tank that I added 3 platies to today. I do not want to breed the fish. I can tell I've got 1 adult female and 1 adult male. I'm having problems identifying what the third one is. I'm planning on exchanging either the male or female so they are all 3 the same sex once I figure out what the baby is. Can anyone help me? Hopefully you can click on the pic for larger viewing.