Walter R. Courtenay, Jr., 80, died on January 30, 2014. He completed his B.A. degree at Vanderbilt University in 1956 and his Ph.D. degree from the University of Miami in 1965. He served as a faculty member at Duke University (1963-65), Boston University (1965-67), and Florida Atlantic University at Boca Raton (1967-1999) where he twice chaired the Department of Biological Sciences. At various times he also held research appointments with the U.S. Bureau of Commercial Fisheries, the Museum of Comparative Zoology (Harvard University), U.S. Fish and Wildlife Service, and Arizona State University. He served as consultant on introduced fishes for the Fishery Resources and Environment Division, Food and Agriculture Organization of the United Nations in Budapest and Rome in 1988, for the Foundation for Research Development, Council for Scientific and Industrial Research, Pretoria, South Africa in 1988, for South Australia Department of Fisheries, Adelaide, Australia in 1989, and for the Office of Technology Assessment, Congress of the United States, in 1991-92. After retirement he relocated to Gainesville, Florida, where he continued his research alongside colleagues at the University of Florida, several of whom he collaborated with on various projects and publications. In 2000 he was made fellow emeritus of the American Institute of Fishery Research Biologists. In 2007 he received the American Fisheries Society Lifetime Achievement Award. Walter was an ichthyologist and a leading authority on invasive non-indigenous fish, particularly those introduced into the United States. In his final years he held the position of Courtesy Curator for the Florida Museum of Natural History at Gainesville and Research Fishery Biologist with the U.S. Geological Survey, Biological Resources Division, at the Florida Integrated Science Center in Gainesville. Walter was predeceased by his wife, Patricia, in 2007. He is survived by a brother, stepmother, son, daughter, granddaughter and his children's mother. In lieu of flowers, a memorial donation may be made to Haven Hospice, 4200 NW 90th Blvd, Gainesville, Florida 32606.