21 November 2022. Maraã, Brazil. A fisherman from Sao José community, carrying a pirarucu in his canoe, inspects a net in a lake in the Amanã Sustainable Development Reserve ( Reserva de Desenvolvimento Sustentável Amanã ).The management of Pirarucu ( Arapaima gigas ) is one of the main sustainable economic activities in the Amazon, bringing income to riverside populations and helping to preserve the environment.