James (Jeb) E. Byers studies marine populations and communities. In addition to parasite ecology, he also investigates non-native species invasions, ecosystem engineers, and how oceanography and biology combine to shape the biogeography of marine species. He spent seven years as faculty at the University of New Hampshire and is presently Distinguished Research Professor in the Odum School of Ecology at the University of Georgia. He is a Fellow of the American Association for the Advancement of Science (AAAS) and the Ecological Society of America.April M.H. Blakeslee has focussed her research interests on conservation biology, invasion ecology, parasite ecology, biogeography, and the evolutionary ecology of marine organisms in estuarine and marine habitats. She has past appointments at the Smithsonian Institution and Long Island University-Post and is currently Associate Professor of Biology at East Carolina University. She is also Adjunct Faculty with Shoals Marine Laboratory(co-administered by the University of New Hampshire and Cornell University) and with Miami University's Global Field Program. Since 2018, she has been an appointed member of a working group on marine introductions for the International Council for the Exploration of the Sea (ICES).John P. Wares has focused his research and teaching on the spatial distribution of biodiversity--both among and within species--of primarily marine and aquatic organisms. He has been at the University of Georgia since 2005 and has taught topic-relevant workshops and courses at Pontificia Universidad de Chile--Coquimbo and Friday Harbor Laboratories. Professor Wares is currently in the Odum School of Ecology and Department of Genetics at the University of Georgia, as well as a curator of aquatic invertebrates for the Georgia Museum of Natural History.