Gafftopsail Catfish
The gafftopsail catfish is a marine and estuarine species that reaches the southern end of its Atlantic range along the Brazilian coast.
Anglers catch it from beaches, piers, and estuaries from the Northeast down through the Southeast, with documented catches at spots like Praia de Cruz das Almas in Alagoas, Canal de São Sebastião in São Paulo, and the Rio Mumbaba in Paraíba.
It's a bread-and-butter saltwater target for shore anglers fishing bays and river mouths.
Scientific Name: Bagre marinus
Also known as Bagre-gato, bagre marinho, bagre-do-mar
- Elongated body with smooth, scaleless skin; blue-gray to slate on the back fading to pale silver or white on the belly.
- The tall, sail-like dorsal fin is the defining feature — its first ray extends into a long, flat filament, as do the leading rays of the pectoral fins.
- Long, flat maxillary barbels extend past the pectoral fins; one shorter pair sits on the chin. Spines on the dorsal and pectoral fins carry a toxic slime coating — handle carefully.
- Common fish run 40–50 cm and around 1–2 kg; larger specimens reach 69 cm and up to 4.4 kg.
What to know
Habitat Distribution
- Native to the western Atlantic; the Brazilian coast marks the southern edge of its range, from the Northeast (Pernambuco, Paraíba, Alagoas) down to São Paulo state.
- Primarily a coastal and estuarine fish — found in bays, lagoons, mangrove-lined river mouths, and brackish estuaries, as well as open surf and nearshore reefs.
- Tolerates a wide salinity range, moving freely between full saltwater and brackish zones; documented in tidal rivers like the Rio Mumbaba in Paraíba and Canal de São Sebastião in São Paulo.
- Depth range is shallow — typically 0 to 50 m, with most fish holding in the lower half of the water column over soft or mixed bottoms.
Key Locations
- Praia de Cruz das Almas, Alagoas — multiple documented catches from this northeastern beach; typical surf and nearshore structure fishing.
- Canal de São Sebastião, São Paulo — tidal channel on the São Paulo coast with confirmed catches; strong tidal flow concentrates fish.
- Rio Mumbaba, Paraíba — tidal river in the Northeast where the species penetrates brackish water alongside trahira and tilapia.
- Canal de Santa Catarina, Santa Catarina — southern limit of documented Brazilian catches; fish here are near the edge of the species' range.
Specific Spots
- River mouths and tidal channels concentrate fish as tidal flow pushes baitfish and crustaceans through — fish the edges of the current rather than the full flow.
- Pier and jetty pilings hold gafftopsails because the structure attracts shrimp and small crabs; bottom rigs fished tight to the base of the structure produce consistently.
- Mangrove edges in estuaries are reliable at low light — the fish move shallow to feed when light drops and pull back to deeper channel edges during bright midday conditions.
- Sandy surf troughs and nearshore beach breaks, particularly where a trough runs parallel to shore, hold fish working the bottom for crabs and worms.
Gafftopsail Catfish FAQ
Answers from onWater's species guide.
What are the best lures and bait for Gafftopsail Catfish?
Live or fresh-dead shrimp on a bottom rig is the top producer across all habitats, no other bait comes close for consistency in estuaries and off piers. Cut crab, cut squid, and bloodworms work well when shrimp aren't available; any natural bait with strong scent fished on the bottom will draw strikes.
When is the best time to fish for Gafftopsail Catfish?
Warmer months (October–March, Brazilian summer) bring the most active feeding as water temperatures peak along the coast. Larger fish tend to appear during the cooler austral autumn and winter months (April–August), consistent with the species' pattern across its range.
How do you catch Gafftopsail Catfish?
Shore anglers targeting gafftopsails in Brazil work piers, jetties, and beach surf with bottom rigs baited with shrimp or cut crab, casting to troughs, channel edges, and structure. Fishing at dawn, dusk, or after dark improves results, as fish move shallower and feed more actively in low light.
What do Gafftopsail Catfish eat?
Crustaceans, shrimp and crabs, make up the bulk of the diet, which is why live or fresh-dead shrimp is the single most reliable bait. Cut crab also works well fished on the bottom.
Where do Gafftopsail Catfish live?
Native to the western Atlantic; the Brazilian coast marks the southern edge of its range, from the Northeast (Pernambuco, Paraíba, Alagoas) down to São Paulo state.
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