Brazilian fishermen work on their boat near the mouth of the Amazon River in Curuca, May 19, 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 19, 2009. REUTERS/Paulo Santos (BRAZIL ENVIRONMENT SOCIETY)