Sexing Baryancistrus beggini, some help please

[Jacqueline]

I have a new breeding project settling in my quarantine tank right now. On arrival I took pictures of them and tried to have a go at sexing them.
But it's quite difficult and could do with some help. I know they are not fully grown yet and they are not in breeding condition but if any one would like to help identifying their gender as good as it goes, I would greatly appreciate the input.

Fish 1




Fish 2




Fish 3




Fish 4





Fish 5




Fiah 6




Fiish 7




Fish 8




Fish 9