For the fourth consecutive year, Pelagosphera renews its collaboration with ARPA Campania for qualitative and quantitative analyses of mesozooplankton samples from four areas: the Domitian coast, the Gulf of Naples, the Gulf of Salerno and the Cilento coast. These areas are included in the monitoring plan established under the Marine Strategy Framework Directive (MSFD)programme, within the European Union’s second implementation cycle, 2021–2026.