This book provides a comprehensive review of some predominant environmental risks that marine fish cage aquaculture poses in the marine environment and designs and practices now in use to address these environmental risks in the U.S. and elsewhere. The book includes a critical review of the large body of scientific work published since 2000 on the environmental impacts of marine finfish aquaculture around the world. The purpose of this book is to provide a basic set of guidelines for risk managers and other decision makers to use all information available to assess the different ecological risks of marine fish aquaculture in a variety of marine ecosystems.