Acoupa Weakfish
The acoupa weakfish — known along Brazil's coast as pescada-amarela — is one of the most commercially important marine fish in the country, making up a significant share of Brazil's total marine catch.
It runs the entire Brazilian coastline but reaches its greatest abundance on the Amazon Continental Shelf, where large-scale artisanal fleets target it year-round.
Its swim bladder commands extraordinary prices in Asian markets, making it doubly valuable to fishermen.
Scientific Name: Cynoscion acoupa
Also known as Pescada-amarela, pescada
- Body nearly uniform silvery with a dark greenish back; no bold spots on the flanks, but diffuse dark shading along the dorsal fin base.
- Large mouth with prominent canine teeth — the genus name literally means "dog-toothed" — which helps separate it from smaller, blunter-jawed sciaenids.
- Common catch size around 45 cm; fish regularly exceed 70 cm in commercial landings, and the species can reach 110 cm and 17 kg at maximum recorded size.
What to know
Habitat Distribution
- Native to the western Atlantic from Panama to Argentina; recorded along the entire Brazilian coast, from the Amazon mouth south to São Paulo and beyond.
- Most abundant on the Amazon Continental Shelf, particularly in the waters off Pará, Amapá, and Maranhão in the north.
- A demersal inshore species that works depths from the surface down to about 20–30 m, favoring coastal and estuarine zones.
- Also fished commercially off the São Paulo coast in southeastern Brazil, though yields there are lower than in the north.
Key Locations
- Amazon Continental Shelf (Pará, Amapá) — the core of Brazil's acoupa weakfish fishery, with the largest artisanal fleet concentrations.
- Vigia de Nazaré and Bragança, Pará — major port hubs where vessels land catches from the Amazon Shelf grounds.
- Baía de São Marcos, Maranhão — documented as a significant area for the species, including reproductive activity.
- São Paulo coast (southeastern Brazil) — a secondary fishery zone where the species is caught by both artisanal and industrial fleets, though at lower volumes than the north.
Specific Spots
- Rocky bottom areas down to 30 m depth are prime feeding grounds — fishermen on the northern coast consistently report this as where the fish concentrate to feed.
- Spawning happens over rocky, non-estuarine habitat, so those same hard-bottom zones hold fish during the reproductive period.
- Inshore shallows and estuarine edges attract juveniles and feeding adults, particularly where baitfish schools concentrate near structure.
Acoupa Weakfish FAQ
Answers from onWater's species guide.
What are the best lures and bait for Acoupa Weakfish?
Live or cut sardines and small weakfish match the natural diet directly and are the most straightforward bait choice along the northern coast. Silver or white jigs and deep-running plugs that imitate slender baitfish work over the rocky bottom zones where the fish feed, keep the presentation near the seafloor.
When is the best time to fish for Acoupa Weakfish?
Fishing effort on the Amazon Shelf peaks during the dry season (roughly June–November), when Amazon River discharge drops and fish concentrate on the shelf. The wet season (approximately December–May) sees reduced effort in the north as river conditions and fish distribution shift.
How do you catch Acoupa Weakfish?
On the northern coast, artisanal boats work the Amazon Continental Shelf with gillnets, targeting rocky bottom areas in depths to 30 m. In southeastern Brazil off São Paulo, both artisanal and industrial vessels fish inshore demersal grounds using a wide range of gear.
What do Acoupa Weakfish eat?
Feeds heavily on other fish, local fishermen on the northern coast identify smaller weakfish (Macrodon ancylodon) and sardines (anchovies and related engraulids) as the main prey. Matching these with slender silver lures, jigs, or baitfish-imitating flies makes sense.
Where do Acoupa Weakfish live?
Native to the western Atlantic from Panama to Argentina; recorded along the entire Brazilian coast, from the Amazon mouth south to São Paulo and beyond. Most abundant on the Amazon Continental Shelf, particularly in the waters off Pará, Amapá, and Maranhão in the north.
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