Thanks
I got 4 longfin - one has bristles so definitely male and way bigger, the one in the pic is the next size down. The smallest has much shorter fins and tail without the white edging so I would say very likely to be a female. I was a bit mean - when I was asked which 4 I wanted I replied ' I want 2 males and 2 females' then nearly fell over laughing. However this may well be what I in fact did get.
I have wondered if the two bigger spotted bn or 'whatevers' may be a pair as the second one in size is a lot plumper looking. The 3 smaller ones are way way way smaller, only about 4-5cm max.
Good luck with your spawn. I'll be interested to see how they turn out.