More than 150 teams of scientists and experts from the Occitanie Region participated in the 24th issue of the Dossiers d’Agropolis International series, dedicated to marine and coastal sciences in the Mediterranean. These teams come from 15 universities and engineering schools, 13 national research institutions, as well as—and this is a first for this series—private businesses—namely start-ups, consultancy firms, national and even international companies having a presence in Occitanie— and civil society organisations. Thus, without being exhaustive, this Dossier reflects the diversity, dynamism, originality and multidisciplinary nature of the scientific, applied technological and citizen research pertaining to marine and coastal sciences, both in Occitanie and at national and international levels.