John Humphreys is a professor of marine biology and former Pro Vice-chancellor at the University of Greenwich, London, where his work in Africa won a Queen’s Award for Higher Education. He has served as Chair of the Southern Inshore Fisheries and Conservation Authority and as a non-executive director of a commercial port and harbour authority. He is currently President-elect of the Estuarine and Coastal Sciences Association and a Fellow of the Royal Society of Biology. His books include Marine Protected Areas: Science, Policy and Management (2020).