Productive areas include the deep pools immediately downstream of rapids or riffles, where oxygen levels are high and prey is funneled. Undercut banks with overhanging vegetation, particularly in the middle and lower sections, consistently hold pacú and provide cover for dorado. Confluences where Riacho Caí Mbocá meets larger rivers create nutrient-rich zones that attract large concentrations of baitfish and, consequently, predators. Areas with significant submerged timber and root wads are prime locations for targeting large surubí.