It's confirmed, we do have males and females! but our males look nothing like the ones in your pictures just yet. I put a few in a planted tank and they started looking like these:
http://www.gophoto.it/view.php?i=htt...g#.UJcDQ8XA_2s
but the ones from the quarantine tank, their colors haven't shown just yet. Don't want you to be disappointed when you get a fish that doesn't look exactly like your picture!