Productive areas include the deep pools at the base of riffles and runs, where dorado and surubí often lie in wait. Confluences where Arroyo Robledo meets larger rivers are always worth exploring, as they create current seams and depth changes that attract baitfish and predators. Undercut banks, especially those with overhanging vegetation or root structures, are reliable spots for pacú and surubí. Areas with submerged logs or other woody debris provide excellent cover and are prime targets.