Curimatá pacu
The curimatá pacu is the São Francisco River basin's signature bottom-feeder — a detritivore that scrapes organic matter and algae from submerged surfaces.
Native to the São Francisco and introduced into reservoirs across northeastern Brazil, it's a commercially important fish and a staple of local subsistence and sport fishing. Schools migrate with the flood pulse, making timing everything.
Scientific Name: Prochilodus argenteus
Also known as Curimatá, Curimatã, Corumbatá, Crumatá, Curim, Grumatá, Grumatão, Xira, Curimatá-pacú
- Silvery, laterally compressed body with a blunt snout and a distinctive fleshy, sucker-like mouth adapted for scraping detritus off hard surfaces.
- Scales are large and clearly defined, giving the flanks a slightly metallic, overlapping-plate appearance — useful for distinguishing it from similar prochilodontids.
- Typical catch runs 30–50 cm; the largest individuals recorded reach nearly 60 cm and close to 7 kg, with some migratory fish reported up to 15 kg.
What to know
Habitat Distribution
- Native to the São Francisco River basin; subsequently introduced into reservoirs and river systems across northeastern Brazil.
- Thrives in whitewater and clearwater rivers — generally absent from blackwater rivers, which tend to be too acidic and low in the organic material it feeds on.
- Occupies both river channels and reservoir environments, moving between the two depending on season and water level.
Key Locations
- São Francisco River basin — the species' native range and the heart of the curimatá pacu fishery in Brazil.
- Reservoirs of northeastern Brazil, where introduced populations support both commercial and subsistence fishing.
Specific Spots
- During low water, look for schools holding in deeper river channels and reservoir basins where detritus accumulates on soft, silty bottoms.
- At the start of rising water, fish concentrate in main-channel current seams as they begin upstream spawning migrations — these moving schools are the most predictable intercept points.
- Rocky or hard substrate areas with algae and biofilm growth draw feeding fish, since they actively scrape surfaces rather than hunting prey.
Curimatá pacu FAQ
Answers from onWater's species guide.
What are the best lures and bait for Curimatá pacu?
Natural bottom baits are the go-to: fermented dough balls, manioc-based pastes, and cornmeal preparations fished on small hooks (sizes 4–8) directly on the riverbed or reservoir floor.
When is the best time to fish for Curimatá pacu?
Rising water (typically late spring into summer in the São Francisco region) triggers upstream spawning migrations, the most concentrated and fishable period of the year.
How do you catch Curimatá pacu?
Most anglers fish from the bank or small boats using bottom rigs baited with dough or fermented paste, targeting schools in river channels and reservoir flats. Intercepting migrating schools in main-channel current during the rising-water season is the most productive approach.
What do Curimatá pacu eat?
Feeds almost entirely on detritus, decomposing organic matter, algae, and microbial films scraped from rocks and the riverbed. This makes conventional lure fishing largely ineffective; natural baits presented on or near the bottom are the standard approach.
Where do Curimatá pacu live?
Native to the São Francisco River basin; subsequently introduced into reservoirs and river systems across northeastern Brazil. Thrives in whitewater and clearwater rivers, generally absent from blackwater rivers, which tend to be too acidic and low in the organic material it feeds on.
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