Productive areas are typically associated with structure and transitions. Focus efforts along the margins where flooded forest meets open water, especially where fallen trees (known as "galhadas") and root masses provide cover. The mouths of smaller channels or igarapés flowing into the main lake are also hotspots, as they funnel baitfish and attract predators. Deeper holes and drop-offs within the lake basin hold larger fish, particularly catfish, during the hotter parts of the day.