Finally, after some long two weeks of waiting for my local dealer to order, my six (?) fish arrived with me last Friday.
“six (?)” because I missed to them a) before I put some leaves into the transport bag to provide some hiding places and b) when I set them free into the tank, where I counted six animals so far.
And no further clarity regarding the gender distribution. I hope, Aquarium Dietzenbach did a good job and sent 3.3. But as the fish are still rather small and not yet in mood to show too much color, I cannot varify yet.