Didier Gascuel is an ecology professor at the Institut Agro in Rennes, France, where he is head of the Fisheries and Aquatic Sciences Center and leads a master’s programme in Fisheries and Aquaculture Sciences. For nearly 30 years, he has been involved in the assessment of marine resources, fisheries, and ecosystems health, especially in European waters and in Western African countries. His current research focuses on the sustainable exploitation of marine resources and the modelling of the impacts of fishing and climate change on ecosystems. He is a member of the Scientific Committee of the French Institute for Ocean Science, Ifremer, and has been a member of the Scientific, Technical and Economic Committee for Fisheries (STECF, 2008–22) of the European Union. From 2009 to 2017, he was the chairman of the French Association of Fisheries Scientists, which actively contributes to the public debate on sustainability of human maritime activities. He has published more than 200 scientific articles and presented over the past 5 years nearly 100 conferences for the public across France, on various topics related to sustainable fishing, marine biodiversity, and the impacts of climate change.