A few months ago I had a similar dilemma with A.nijsseni. I bought a beautifully coloured male and a bright yellow fish I thought was female. It did not have much black colouration but as it was so yellow I thought it must be female. Once transferred to home it gradually became more male looking and in the end blue. I'd say look for the obvious black blotches on the operculum etc for a sure fire female, not the ground colour alone. Helen kindly located a female for me, now after about six spawnings and various water conditions still no fry, very frustrating. 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"!