The IUCN World Commission on Environmental Law (WCEL) might be described as the source of this Research Handbook thanks to the work of the WCEL’s Specialist Group on Oceans, Coasts and Coral Reefs. The need to address the growing threats and law and policy challenges raised by ocean acidification was originally identified at the WCEL’s first World Environmental Law Congress in Rio de Janeiro, Brazil in April 2016. Subsequently, the Specialist Group, then co-chaired by Nilüfer Oral and David VanderZwaag, proceeded to invite and energize its expert members in ocean law and policy from around the world to contribute to this volume which is designed to serve as an ocean acidification law and policy guide. Special thanks go to the WCEL and its chair, Justice Antonio Herman Benjamin, for the leadership and support for advancing the progressive development of environmental law including in the sphere of climate change, ocean acidification, and ocean governance.