You know, I think they are really quite young fish, and maybe its just not really possible yet to be sure what sex and what species
No, Helene, I don’t think that they are “very” young. The smaller ones are younger, yes – but even they are about 2 or 2,5 cm/ total length. Compare to the diameter of the clay tube …… it’s about 2 cm.
And the bigger ones are as big as my P. nagyi, about 3 or 3,5 cm, so I think they might be full grown, depending on the species.