Confluences where the Rio Macari meets smaller tributaries often create current seams and nutrient-rich areas that attract baitfish and predators. Deep pools located on outside bends of the river, especially those with submerged trees, are reliable spots for large peacock bass and catfish. Sandbars and points that create current breaks are excellent areas to cast for actively feeding fish. Backwater lagoons connected to the main river during high water are prime locations for arapaima.