This book explores the critical role of transnational fishers’ movements in the politics of global fisheries. This is the 8th book in the Critical Development Studies series.Global politics around fisheries are complex and contentious. Embedded within this sector, small-scale fishers’ movements are continuouslyconfronted with new actors, issues and conflicting interests. Yet, these movements and their political agendas have played a critical role in global fisheries. This book offers an insightful exploration and analysis of two transnational movements — the World Forum of Fisher Peoples (WFFP) and the World Forum of Fish Harvesters and Fish Workers (WFF) — tracing their origins, development, struggles and engagement in international political spaces. It explores three overlapping analytical spheres: transnational movements contesting and seeking to influence the politics of global fisheries; international political spaces movements are prioritizing; and contentious fisheries issues movements are struggling over.