The legal regime of marine areas beyond national jurisdiction (ABNJ) has received much attention in the last decades. The ongoing process in regards of an agreement on the conservation and sustainable use of marine biodiversity in ABNJ, initiated in the early 2000s (BBNJ process) is crucial evidence of this. However, this process reflects entrenched interests and political and legal structures, muting other voices and alternative approaches. International Law and Marine Areas beyond National Jurisdiction investigates competing constructions of ABNJ and their role in the creation and articulations of legal principles, which provides a broader perspective on the BBNJ process.