Contemporary politics around fisheries are complex and contentious. Fishers’ movements and their political agendas have played a critical role in global fisheries, particularly in the context of rural and environmental transformations. This book explores two transnational movements representing small-scale fishers — the World Forum of Fisher Peoples (WFFP) and the World Forum of Fish Harvesters and Fish Workers (WFF). It brings the politics of these movements into academic and political debates by exploring three connected 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. This book draws upon political economy and political ecology debates, focusing its multi-layered analytical approach on socio-ecological dynamics of fisheries politics.