im not sure, im hoping one of each as one has a long body and one is more rounded. i cant find much solid info on how to sex them except for different dorsal fin lengths, and even then they say that it is not a sure way to tell.
i dont believe they get the pink bellies, would look cool if they did and you would be able to tell sex easier.
im hoping when they get a bit bigger it will be easier to tell but i am hopeful since they dont fight and seem to hang out with each other 24/7 that it is one of each. :dunno: