Joining others who call attention to the ways in which the ocean, its spaces, and its resources are being commodified, enclosed, and extracted in ways that benefit some at the expense of others, this paper offers a synthesis and review, echoing and extending the cautions being posited around ocean privatisation discourses and their tendencies toward simplistic conceptualisations and presentist thinking that all too often limit critical analysis. Therefore, this paper synthesises and analyses existing literature on the institutions and processes through which the 'privatisation' of the ocean has been, and is being, implemented, leading to two important points. First, it is showed how privatisation processes are often more complex than the word suggests. Privatisation is anything but 'private'. The enclosure, appropriation, and rationalisation of space, resources, knowledge, and governance in the marine domain are occurring in institutional matrices where private actors operate in an array of relationships