The past few decades have witnessed the emergence of a vast array of regional arrangements and institutions dealing with all aspects of ocean management. The level of cooperation ranges from minimal dispute avoidance to relatively comprehensive ocean governance at the regional level. As concrete examples, reasonably successful and comprehensive regional regimes have been created for the Baltic, the North, and the Mediterranean Seas and the South Pacific. And attempts at regional regime building are ongoing in Southeast Asia, the South China Sea and the Indian Ocean. Although there are broad...