Approved for Scoping: BF Administrative Plenary November 2023   Lead BF Member: AllEnvi/ANR   Estimated launch timeframe: June 2025   Brief Summary:   Covering an expansive 70% of the Earth’s surface, the ocean is a vital part of our planet, playing a fundamental role in sustaining life and fostering a thriving global ecosystem. The ocean’s importance is related to various issues such as climate change, energy, agriculture, health, and sustainable resource management. In this context, the ocean emerges as a central player given that it is a major carbon stock and climate regulator. However, the “Blue acceleration” highlights increasing human pressures on marine ecosystems, threatening their ability to sustain life.   Marine conservation areas are essential components of global efforts to protect and sustainably manage our oceans. These designated areas, often referred to as marine protected areas (MPAs), play a crucial role in safeguarding marine biodiversity, habitats, and ecosystems. By establishing these zones, authorities aim to monitor and mitigate the impact of human activities, such as overfishing and habitat destruction, while providing refuge for endangered species.   Data collected from MPAs provides important evidence towards the development of policies that will support biodiversity conservation and sustainability of our marine ecosystems. Within this context, this Collaborative Research Action (CRA) would aim to coordinate international projects with a transdisciplinary approach focused on marine biodiversity and socio-ecosystems relying on oceans to mitigate and adapt to global environmental change and achieve global well-being by 2050.