Trairão
The trairão — a complex of large Hoplias species including H. intermedius, H. lacerdae, H. australis, and H. curupira — is one of Brazil's most formidable freshwater predators.
Built like a pike with the teeth of a barracuda, these fish draw dedicated anglers to rivers across the Amazon basin, the São Francisco, the Paraná, and southern drainages. They hit topwater lures with shocking force and fight dirty in close quarters.
Scientific Name: Hoplias intermedius
Also known as Trairão, Wolf fish, Lobo do rio, Trahira grande
- Thick, cylindrical body with a broad, flattened head and a jaw packed with recurved, conical teeth — handle with serious caution.
- Coloration runs from olive-brown to dark brown with faint banding or mottling along the flanks; the head is often darker than the body.
- Larger than the common traíra (H. malabaricus) — typical fish run 5–15 lbs, with specimens exceeding 30 lbs recorded in Amazon tributaries.
- The lower jaw margins run nearly parallel when viewed from below (U-shaped), distinguishing the trairão group from the smaller, V-jawed traíra.
What to know
Habitat Distribution
- Native to Brazil across several major drainages: H. curupira in the Amazon basin (rios Negro, Tapajós, Xingu, Tocantins, Trombetas); H. intermedius in the rio São Francisco, upper rio Paraná, and rio Doce; H. lacerdae in the rio Ribeira de Iguape; H. australis in the rio Uruguai.
- Prefers rocky, swift-flowing rivers and streams, though it also uses flooded forest margins and backwaters during the wet season.
- A strictly freshwater species — found in clear to moderately turbid rivers, often near structure like submerged rocks, root tangles, and fallen timber.
Key Locations
- Rio Teles Pires (Mato Grosso) — a top destination with dedicated fishing lodges targeting trairão in rocky stretches.
- Rio Juruena (Mato Grosso) — remote, clear water with strong populations; accessed via specialist fishing camps.
- Rio Xingu and Rio Trombetas (Pará) — Amazon basin rivers holding H. curupira, fished from lodges like Pousada Arapari on the Trombetas.
- Rio São Francisco — home to H. intermedius across its middle and upper reaches through Minas Gerais and Bahia.
- Rio 7 de Setembro (Mato Grosso) — featured in the Rota do Trairão circuit, with fish reported to 74 cm from rocky river sections.
Specific Spots
- Rocky ledges and boulder fields in fast-moving stretches — trairão use these as ambush points, sitting tight against structure and waiting for prey to pass.
- Flooded forest edges and submerged root systems during high water, when fish move into the shallows to feed on frogs and small animals.
- Current breaks behind large rocks or fallen trees, where the fish can hold without fighting the flow and still intercept passing baitfish.
- Deep pools at the base of rapids — larger fish rest here between feeding forays and are accessible by boat with a well-placed cast to the edge of the fast water.
Trairão FAQ
Answers from onWater's species guide.
What are the best lures and bait for Trairão?
Large topwater lures, oversized poppers, prop baits, and walk-the-dog style plugs in the 4–6 inch range, are the most exciting and effective presentation, especially along flooded edges and near rocky structure.
What flies work for Trairão?
Large deer-hair or foam poppers (3–5 inches) fished on the surface along flooded forest edges and near rocks produce the most dramatic strikes, the take is explosive and visual.
When is the best time to fish for Trairão?
Dry season (roughly May–October in the Amazon basin and central Brazil) concentrates fish in main river channels and rocky pools as water levels drop, making them more accessible and predictable.
How do you catch Trairão?
Most anglers in Brazil target trairão by boat, working rocky river sections and flooded forest edges with large topwater lures or flies cast tight to structure.
What do Trairão eat?
Primarily fish, they eat whatever baitfish share their water, but trairão also take frogs, small mammals, birds, and even other trairão. This broad diet means large profile lures and flies that push water or create surface disturbance draw strikes.
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