I have got three ancistrus species in my tank, but i don't know which exactly..
Perhaps one of you could help me?
I always give them a 'normal' name, because I don't know all the scientific names.
If have got pictures from all of them:
Ancistrus No. 1 - named 'Zwoelie'


Ancistrus No. 2 - named 'Yellow'


Ancistrus No. 3 - named 'Ciske'



And perhaps someone could tell me which one is male or female? I think No. 1 is male and No. 2 is female.. not sure about No. 3 because he/she is very young.
Thanks already!