This technical paper provides a comprehensive review of the use of wild fish as feed inputs for aquaculture covering existing practices and their sustainability as well as implications of various feed-fish fisheries scenarios. It comprises four regional reviews (Africa and the Near East, Asia and the Pacific, Europe and Latin America and North America) and three case studies from Latin America (Chile, Peru and the study on the use of the Argentine anchoita in Argentina, Uruguay and Brazil). The four regional reviews specifically address the sustainable use of finite wild fish resources and the role that feed-fish fisheries may play for food security and poverty alleviation in these four regions and elsewhere. Based on the information presented in the global synthesis, regional reviews and three case studies, and through the fresh analysis of information presented elsewhere, an exploratory paper examines the use of wild fish as aquaculture feed from the perspective of poverty alleviation and food security.