Marine mammal conservation remains a hot-button international environmental issue, but progress towards addressing key conservation and management issues within existing governance structures - most notably the International Whaling Commission - has stalled. Cameron Jefferies offers a fresh look at the future of international marine mammal management in a way that advances the ongoing dialog surrounding UNCLOS implementation and effective living marine resource management, while employing the comprehensive rational decision-making model as a theoretical framework. Marine Mammal Conservation and the Law of the Sea lays out and critiques the marine mammal regulatory landscape. It introduces the rational conservation model, and details the modern threats to marine mammals, including climate change, by-catch, environmental pollution, ship strikes. Next, it discusses options for reform under UNCLOS and existing treaties, and finally introduces a new holistic treaty regime based on the rational conversation model, based in part on the UN Fish Stocks Agreement. This book will appeal to scholars, practitioners, and policymakers across public international law, international relations, political science, and environmental policy in the academic, governmental, IO, and NGO spheres.