Billions of people depend on fish as a critical source of protein. From lobster divers in Belize to handline mahi-mahi fishers in Peru, communities around the world feed themselves and make a living from the fish they pull from the ocean every day. But these livelihoods are under threat. Climate change is already wrecking havoc for coastal communities in developing countries, with rising seas damaging dockside infrastructure and warming waters driving away traditional fish stocks. The result is loss of income, food, and in many cases, cultural heritage.