>>I believe there is a captive maintenance organization (Aquatic Conservation something or other) that has outlined methods for establishing such a program. << I will be joining in the American Killifish Association's species maintenance program in a few weeks once I make some room and buy some more fish (Aphyosemion australe brown form, which is it's normal wild coloration as apposed to the gold or orange morphs). Anyway, I can pass on some info when I get it. I know that once a species is identified for the program, the participants agree to keep several breeding pairs, maintain a stud book, and occasionally exchange fish between other participants. Tom Grady is the committee chair for the program and was very involved in the selection criteria. They chose a representative fish from several species. Some of the criteria was based upon availability, habitat endangerment, and breedability (a fish that meets all of the requirements but can't be bred in captivity would be nice to preserve but would fail in the program). I can email Tom and ask for more specifics if there's an interest. Bill Vannerson http://ourworld.compuserve.com/homepages/william_vannerson