it is 3", he/she has somewhat rounded dorsal/anal fin, it has a blue end at the end of its anal fin not green, and doesnt seem to have a horn on its head or anything like that, he/she is also very very peaceful doesnt bother noone including some goldfish i bought(not here anymore) and also loved to get chased by a 2-3x smaller firemouth and a gourami 24/7 so by the behaviour/description is it a male?