Aracu cabeça gorda

Habitat Distribution

• Native to South America and widespread across Brazil — found throughout the Amazon basin, the estuary region around Marajó Island, the Tocantins drainage, and Cerrado river systems in states like Goiás and Amapá.
• Favors slow-moving river channels, flooded forest (igapó and várzea), oxbow lakes, and floodplain lagoons — anywhere seasonal flooding creates access to terrestrial food sources.
• Also recorded in clearer Cerrado streams, where it occupies mid-water over sandy or rocky substrate.
• The Central Amazon accounts for the largest share of commercial catches; significant numbers also come from the estuary and the Tocantins region.

Key Locations

• Central Amazon — the core of the commercial fishery, accounting for the majority of recorded catches across floodplain lakes and main river channels.
• Marajó Island estuary region — significant catches in the inner delta, where aracu move through tidal and freshwater mixing zones.
• Rio Flechal, Amapá — a documented sport-fishing destination for aracu cabeça gorda, with local anglers specifically targeting the species.
• Tocantins drainage — a notable secondary fishery region for this species.
• Cerrado river systems in Goiás — present in streams and reservoirs, where it is noted as both a food fish and a target for recreational anglers.

Specific Spots

• During high water, move into flooded forest edges where fallen fruit and insects concentrate — fish tight to submerged vegetation and root tangles.
• At lower water levels, look for them along rocky or sandy river margins and at the mouths of small tributaries where current slows and food collects.
• Oxbow lakes and floodplain lagoons hold fish year-round; work the shallower, vegetated margins rather than open water.
• During migrations, fish are concentrated at natural bottlenecks — narrow channels between lakes and rivers — where gill nets and hook-and-line both produce well.