Join Date: Jan 2013
Location: Brisbane, QLD, Aus
Re: My 10 gal, 20gal to 55 gal low light tank progression! 56K 10/9/11 LOTS of new p
Going down the list of photos you have up it looks like they are all male, just 2 different types of bristlenose catfish. Albino Shortfin Bristlenose Catfish and Albino Longfin Bristlenose Catfish...
Males have the bristles all over the nose/mouth/lip and females don't. Males are wider in the head than then the females, but the females stay wider in the body.
Hope that helps you work it out, but with the photos you have I'm 90% sure they are all Males...