I got ten of them, but at home I've found one more in the fishbag. I might buy a few more and share them into two groups in two different tanks.
David, I would also say biwae is a hot hint in any case. Now we have to decide between cf. of spec. aff.

Yes Emma, I've seen them eating frozen bloodworms, and living Tubifex. It seems they aren't very interested in catfish tabs at this time.
Thomas