Brazilian fishermen arrive at a sand bar with their catch at the mouth of the Amazon River in Curuca, May 16, 2009. Fishermen capture species ranging from mullet, bass, piraiba and piramatuba catfish, sardines and yellow weakfish, among others, in the mixture of fresh and saltwater that characterizes the mouth of the world's largest river. Picture taken May 16. REUTERS/Paulo Santos (BRAZIL ENVIRONMENT SOCIETY)