Hi, Whoops, the old lack of clarity in e-mail strikes again! I agree they are probably different species, but wanted to make the point range of distribution was important for determination. I see how I muddled it, by saying the pulcher were right beside the 'sacrimontis', but not specifying in a different tank from a different shipment... They can be hard to recognize when stressed, and there are two very differently coloured 'sacrimontis' from the Cross River area, sharing the cheek striping but not the colour intensity. I've never had the big tank I'd need to throw them together and see what happened with these colours over the long run. Fully adult and in a good set -up, they are very different fish. from the common krib. I think it's one of those many species where you have a long geographic range, with the fish at the two ends being classified as different species, but with the dividing line hard to find in the middle. It's something I find very difficult with killie species definitions. I haven't heard as much about this question with Apistos as I have with West African fish. -Gary Mike & Diane Wise wrote: > I have never heard of any interbreeding but I imagine it is possible if the fish > are given no choice. ------------------------------------------------------------------------- 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. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!