Im going to say that based off the last picture that its male, look between the ventral and anal fins that little white point sticking out is the fish's sex organ. It looks quite pointed which generaly indicates a male (99% of the time) however youg females who have never laid eggs can fool and slip past in the 1% lol. Mature females sex organs are in the same spot but they are fairly round and blunt, esp if they have spawned before.