rather than just visual indicators, the females might give out pheromones or so i think. maybe they're just like insects, like the male moth, who recognizes the females just by the pheromones they give out. regards, JY Chen (Singapore) ------------------------------------------------------------------------- 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. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader