Productive areas are often associated with specific types of structure. Confluences where smaller tributaries enter the Rio Flechal create current seams and nutrient-rich areas that attract baitfish and predators. Deep undercut banks, especially those with overhanging vegetation or root systems, are reliable spots for large peacock bass and catfish. Isolated sandbars and points that create current breaks are excellent areas to find actively feeding fish. Backwater lagoons, accessible during higher water, hold concentrated populations of pacu and juvenile peacock bass.