Do all female Rivulus species have the black spot near or at the caudal fin or are there some Riv species that do not have this spot? Tony Kline Northumberland, Pa. Join the AKA at http://www.aka.org/aka/modules/content/index.php?id=9. Archives are at http://sable.actwin.com/pipermail/killietalk/ Modify your subscription at http://mailman.actwin.com/mailman/listinfo/killietalk