Brazilian fisherman Francivaldo de Souza Costa pulls a string of fish into his boat at the mouth of the Amazon River in Curuca, May 20, 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 20, 2009. REUTERS/Paulo Santos (BRAZIL)