Description: The EuroSea project is improving the coordination of the European ocean observing and forecasting system to strengthen its capability of tacking the societal challenges related to ocean health, climate change, mitigation of ocean-related natural hazards, and the sustainable exploitation of marine ecosystem services in the Blue Economy. The scientific excellence of the project is based on its better integration, assimilation, coordination and governance of methods, practices, and instruments to collect fit-for-purpose ocean data and the development of innovative tools and solutions to manage some natural coastal risks and support more efficiently fisheries and aquaculture. The societal impact of the research and innovation activities carried out by the EuroSea consortium is enabled through the responsible research and innovation (RRI) policy concept implemented throughout the project progress development and, in particular, in the demonstrators work packages and in those activities focused on communication, dissemination, exploitation and legacy. This report summarizes how the six articulations of the RRI approach were applied so far in the EuroSea project. It also offers some recommendations to boost the societal benefits provided by inclusivity, equality, ethics, transparency and collaborative co-design and co-creation in the research and innovation process applied to ocean observing. Now, and even more in the future, it is necessary to multiply the opportunities to share knowledge and expertise among all transdisciplinary actors to be engaged in improving the European and global ocean observing and forecasting. Moreover, the emerging critical problems affecting the ocean require an increased public involvement through open access to ocean information, effective communication and dissemination of research findings, more diffuse ocean literacy and collective mobilisation. Only these factors seem to be able to establish the global common responsibility necessary to enhance the ocean sustainability, as advocated by the UN Decade for Ocean Science for Sustainable Development supporting the achievement of the SDG 14 in the UN Agenda 2030.