Great expectations are pinned on marine governance, 1 including protecting the marine environment while promoting sustainable growth in 'blue sectors'. 2 At the same time, marine governance is widely recognised as being complex and characterised by fragmentation. 3 Many of the challenges associated with the marine environment and marine space have been described as 'wicked', implying that science does not provide clear answers and that addressing them is liable to generate winners and losers. 4 It is well established that measures taken in pursuit of marine policy objectives can have significant implications for the social, economic and cultural interests and identities of individuals as well as groups of people. This applies, for example, to the establishment of marine protected areas (MPAs), 5 measures taken to combat 1 United Nations General Assembly (UNGA). Our ocean, our future: call for action. Resolution A/RES/71/312,