This chapter asks whether thinking about space goes far enough in comprehending the ocean, arguing that scholars must engage more with materiality and temporality to discover new forms of ocean governance. Noting the important scholarly work that has moved beyond a planar, or areal, conceptualisation of the ocean, the chapter draws on recent scholarship to critically assess volumetric theorisations that do not sufficiently account for the fluidity of matter within the ocean. It contends that scholars must think through the complex materiality of the ocean by conceptualising the highly mobile stuff within it as being an inherent part of ocean space itself. It then argues that to think about the materiality of the ocean and how it moves and flows, one must engage with temporality, helping one to move beyond both two-dimensional thinking and three-dimensional volumetrics towards an understanding of the ocean as processual and something that happens in time. Surveying recent literature on relational approaches to space, the chapter argues that the future of ocean governance must be multiple, complex, and messy, rather than overdetermined by a political logic of territory that reifies state borders as a byproduct of its legal mechanisms.