Productive areas are focused on structure that provides ambush points and depth. Key spots include the mouths of smaller tributaries flowing into the main igarapé channel, submerged and overhanging tree roots along the banks, fallen timber ("galhadas") in the water, and the deeper pools often found at bends in the stream. Lagoons (locally called "lagoas") connected to the main channel are particularly renowned hotspots, especially as water levels drop, trapping and concentrating large numbers of peacock bass and other predators.