Priority knowledge for marine environments: challenges at the science-society nexus

► Global environmental change is a multidimensional condition, not a discrete 'environmental' problem. ► Translating marine knowledge into effective actions is one of the greatest challenges. ► Social, functional and institutional barriers hinder the implementation of scientific findings to policy and practice. ► Turning marine knowledge into effective actions requires re-calibrating scientific approaches and policy instruments. ► Co-designing knowledge is a feasible way to bridge gaps between marine scientists, policy makers and practitioners.