On April 8th we will discuss questions of maritime security and ocean governance in a roundtable on “How can the oceans be governed?” at Cardiff University. The roundtable brings together a range of scholars from Cardiff University from different disciplines working on maritime issues. The roundtable is a further step in strengthening cross-disciplinary collaboration in the field of maritime research. Further information is available here. In my own presentation I will discuss how the new maritime security agenda changes our understanding of the oceans and how they will be governed in the light of the UK’s upcoming maritime security strategy. I argue that what is going on here is quite a substantial if not radical revaluation of the meaning of the sea and an entirely new attempt to govern the oceans. The security logic is creeping into one of the last domains that was untouched from it before. The sea is becoming securitized. If you are an optimist this will imply that more attention will be paid to what happens at sea and the oceans as a social and environmental space will be better off. If you are a pessimist that will imply new forms of control and new sources of disputes and violence, and potential of escalation.