Production of farmed fish in Brazil has increased steadly over the last years, the production of tambaqui in North Brazil contributing to this growth, mainly in the states of Amazonas, Rondônia and Roraima. These regions rely on technical and economic information on tambaqui production to increase their productivity and profitability, and to mitigate the impacts of technical and economic risks over time. The objective of this study was estimating and simulatingscenarios of profitability on tambaqui production in typical fish farms of the states of Amazonas, Rondônia and Roraima, targeting the market of Manaus-AM. Technical and economic feasibility of fish farming operations were: at Amazonas the investments were R$ 66,594.17 ha-1 and net profit of R$ 0.54 kg-1, for Rondônia the investments were R$ 49,080.19 ha-1 and net profit of R$ 0.25 kg-1, and for Roraima investments were R$ 43,777.18 ha-1 and the net proft of R$ 0.94 kg-1. Amazonas reported net profit of 76% and 64% in prices and technical scenario analysis, respectively. Rondônia presented 92% and 64% chance of net profit in price and technical simulations respectively and Roraima presented 100% of proposed combinations with net profit
