This review paper reviews the importance of fisheries and aquaculture, with particular reference to poor people in the developing world, and the likely impact of climate change on these activities and on food security. It highlights some practical measures that can be taken to adapt to the expected effects of climate change. These focus in particular on building the capacity of communities to adapt to climate change in ways that allow them to moderate potential damage, to take advantage of new opportunities and to cope with the consequences of climate change, and on enhancing the resilience of communities and the ecosystems on which they depend. The review paper recommends basing interventions as much as possible on local practices and traditions.