Dr. Castell is Scientist Emeritus at the St. Andrews Biological Station of the Department of Fisheries and Oceans. Born April 19, 1943 in Guelph Ontario where his Father taught at OAC, he completed his BSc (Hon’s) in Biochemistry at the Dalhousie University in 1964. He was Dr. Robert G. Ackman’s first graduate student completing his MSc in Lipid Chemistry at Dalhousie University September 1965. He completed his PhD in Food Science and Technology from Oregon State University in 1970. His Postdoctoral Fellowship was spent under Dr. Orvill Privitt at the Hormell institute at the University of Minnesota. He joined DFO ‘s Halifax Fisheries Research Laboratory in December of 1970 as a Research Scientist. He served as Head of the Disease and Nutrition Section from 1983 to 1988. His research has involved studies of a wide variety of aquatic organisms including both North American lobsters (Homarus americanus) and spiny lobsters (Panulirus argus) in Cuba, rainbow trout (Oncorhynchus mykiss), Atlantic salmon (Salmo salar), Chinese shrimp (Penaeus chinensis), American and European oysters (Crassostrea virginicus and Ostrea edulis), European crayfish (Asticus asticus), just to name a few of the species. This research would not have been possible without the efforts of many undergraduate, graduate students, postdoctoral fellows, and colleagues at DFO, Dalhousie University, University of Moncton, the Agricultural College of Nova Scotia, the Nova Scotia Technical College, Memorial University of Newfoundland, the University of New Hampshire, the University of Maine at Orono and the University of New Brunswick the aquaculture industry and research institutes around the world. Dr Castell served on the Editorial Advisory Board Associate Editor for Journal of the World Aquaculture Society 1983-1986, Member of Editorial Advisory Board for Aquaculture 1984-1992, Associate Editor for the Journal of Aquariculture 1979-Present, and Associate Editor for Journal of Tropical Aquaculture 1985-present. Dr. Castell was instrumental in the establishment of the International Working Group on Crustacean nutrition and served as Editor of Crustacean Nutrition Newsletter 1983-1992. He has served on the Board of Directors of World Aquaculture Society from 1984 until 1991, including a term as president 1989 to1990. He served on several ICES Working Groups and chaired the ICES Working Group on Marine Fish Culture from 1999 until retirement in 2002. Appointed to U.S. National Academy of Science, National Research Council, Committee on Animal Nutrition, Subcommittee on Warmwater Fish” 1981-83. He serves as an Adjunct Professor at Dalhousie University, the Nova Scotia Agricultural College and University of New Brunswick and founded Castell Aquaculture Nutrition Consulting in 2004. Dr Castell was appointed Canadian Consultant to International Development Research Centre’s (IDRC) Cuba (Langosta) Project 1982-1985. This was a three year cooperative international assistance project to improve live holding and processing of the spiny lobster in Cuba. He was Canadian Consultant to IDRC’s China (Penaeus chinensis) Project 1986-1991 He is also a volunteer advisor with Canadian Executive Services Organization and has been involved in aquaculture projects in China 2001 and Panama 2003.