I have some juvenile Gulf Coast Pygmy Sunfish that I might have to move soon. Currently they are in a holding tank for fish that will eventually go into the 1930s aquarium. This male (the dark colored fish behind the swordtails) is now king of this aquarium and all the other fish give him a wide berth. He hasn't fully colored up yet, but he has colored up enough for me to know he is a he. I guess they aren't juveniles anymore.
I might setup a breeding tank, but I am waiting on @Randy and @Bob to get theirs going (and see who can breed them first).🙂