Hello Steve Need some info first before judging sexes... How big are the fish.... too hard to sex trifasciata below 1/2 inch in size... even at 1" they can be hard to sex. Look for extended 3rd dorsal rays in the fish. Males have this longer dorsal ray where as females dont. I have never had males with black on pelvic fins either, but this isnt always a good reliable method either. Hope you have a pair.... this is a very nice fish. Always loved Trifasciata. I had the blue form when i did keep them. Good luck with your fish. John ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.