I got 2 female convicts from a friend and my wife bought me a male to go with them. I'm still only about 75% sure its a male. I believe it is because the big female actually allows the "male" to swim by her and go into her flowerpot and Ive seen them rubbing against each other. The reasons I'm positive is because "his" stripes are very dull and he has red/rust colored fins. In the past all the male Ive owned have had very dark black stripes and no fin color. Please take a look at the pictures and tell me what you think.