I believe that A.norberti has a distinctive spot towards the rear of the dorsal fin. It also has wavy cacatoides like stripes below the lateral line. Doug Brown has pictures of A.atahualpa at: http://www.geocities.com/Heartland/Plains/7918/photos.html Ken. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!