Productive areas are defined by structure and current breaks. Key spots include the mouths of smaller tributaries and igarapés (small streams) flowing into the main Puduari channel, which funnel bait and attract predators. The edges of permanent lagoons connected to the river are hotspots, especially where they narrow into channels. Any significant accumulation of submerged logs or fallen trees (referred to as "troncos") is a mandatory target. Undercut banks with dense root systems provide excellent cover for large fish.