Ian Harrison obtained his Ph.D. in systematic ichthyology at the University of Bristol, UK. He has conducted research on marine and freshwater fishes from several parts of the world. He is currently the Freshwater Specialist for Conservation International’s Moore Center for Science. He is part of the Steering Committee for the Species Survival Commission (SSC) of the International Union for the Conservation of Nature (IUCN), and co-chair of the IUCN-SSC Freshwater Conservation Committee. He is Associate Director for the Free-Flowing Rivers Laboratory at Northern Arizona University. He is based in Flagstaff, Arizona.