Thank you all for your replies. Sorry for my late response, busy week. I cannot tell about the dorsals, my pair is under two inches. They are not aggressive thus far. Not to each other or their livebearer tank mates. I think one has a more concave tummy than the other but I am not sure. I hate to admit it to all of you experts but I am not so good on the detailed Id. I am still peering into a tank of 3/4 inch borelli fry with a flash light trying to see if the yellow ones stay yellow long enough to make me think they are girls. I am so impressed with you guys who can really see all the teensy details. Thanks again, Teresa. ------------------------------------------------------------------------- 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