The Rio Negro Basin is the heart of the giant peacock's territory. Although, like other large trunk rivers, the deep and fast channels of the enormous Rio Negro itself are not productive enough for us to concentrate our fishing efforts there, the Rio Negro is fed by many tributaries, possesses many side channels (paranas) and sports a host of island archipelagos studded with lagoons that are individually superb fisheries, This huge basin is the most famous of all trophy peacock fisheries and contains the world's largest peacock bass. With at least a dozen productive blackwater rivers, such as the Alegria, Cuini, Araca and the Caures, we normally fish this area from late October until the middle of March. The deeply tannin-stained waters here are unique in their austere characteristics and low nutrient content. Consequently quantity tends to be lower here, but size is the key. The Rio Negro basin contains the world’s largest peacock bass; with plenty of fish in double digits, fish well into the teens common, and monsters ranging from 20 pounds up to world record size lurking here. If a shot at a world record is your goal, then this is your fishery.
The Central Rio Negro Basin
Rio Caures - When water levels are right this river holds many big fish - usually October through January.
The Upper Rio Negro Basin
Rio Urubaxi - A big fish river. The urubaxi generally has a short season (6-8 weeks, typically occurring between November and January. Due to its location, it's prone to quick changes in water level. But when levels are right, anglers will encounter some of the world's biggest Peacock Bass here and still enjoy reasonable numbers (5-15 per day). We've seen fish up to 25 and 1/2 pounds here recently.
Rio Uneiuxi - Another extreme big fish river, the Uneiuxi has large lagoons sparsely spaced along its length. More resistant to water level changes because of its shallow structure, it houses giants up to 26 and 1/2 pounds. It's nutrient poor waters hold a lower overall biomass than other rivers, so numbers tend to be low (5 -10 per day). This river is all about size.
For more information about where to fish and when, see our detailed Peacock Bass Primer