The marine environment, subject to multiple pressures, is transboundary by nature. For ocean management and conservation, there is a need of enhanced collaboration and cross-sectoral solutions. This project aimed to develop a participatory dialogue platform that strengthens cooperation within and between marine regions in line with the 2030 Agenda. The “Marine Regions Forum” brings together stakeholders for joint learning and exchange of good practices, developing recommendations or building of partnerships across sectoral and territorial boundaries. The report shows that the informal format of the "Marine Regions Forum" can complement global discussions and regional efforts alike and thus support processes of ocean governance.