Brazilian fisherman Francivaldo de Souza Costa repairs a fish trap built in the shape of a corral, during low tide on sand flats at the mouth of the Amazon River in Curuca, May 19, 2009. Santos Costa and his fellow fishermen capture about 200 kgs (440 lbs) a day of 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)