Mangrullo
The surubí pintado — called mangrullo in parts of Argentina — is the largest catfish in the Paraná basin and one of the most respected freshwater targets in the country.
It runs the Paraná and its tributaries, grows to sizes that demand heavy tackle, and has been caught on rod and reel at over 86 kg on the Río Paraná itself.
Commercial and sport fishermen both pursue it, making it a cornerstone of the northeastern Argentine fishery.
Scientific Name: Pseudoplatystoma corruscans
Also known as surubí, surubí pintado, surubí común, pintado, mangrullo
- Dark olive-brown back covered in bold black spots that extend across the body and fins — the pattern that gives it the name "pintado" (painted).
- Belly fades to cream or white; the wide, flat head and broad mouth span nearly the full width of the skull, lined with small teeth.
- Two long maxillary barbels extend from the upper jaw; a second pair aligns with the lower jaw — classic long-whiskered catfish anatomy.
- Typical sport-caught fish run 10–40 kg; the species can exceed 100 kg and 160 cm, with females growing larger than males.
What to know
Habitat Distribution
- Native to the La Plata basin; in Argentina it occupies the Paraná River system, including the upper Paraná and the Iguazú drainage in the northeast.
- A bottom-oriented, migratory freshwater fish — it moves upriver to spawn and returns downstream, covering long stretches of large river.
- Prefers the main channels and deeper pools of large rivers rather than shallow backwaters; also found in major tributaries such as those draining Chaco province.
- Specimens have been landed at Puerto Antequera (Chaco) and along the Río Paraná, confirming its presence across the northeastern river corridor.
Key Locations
- Río Paraná — the primary range in Argentina; rod-and-reel records over 86 kg have been documented here.
- Puerto Antequera, Chaco — an active landing and study site where significant research on the species has been conducted.
- Upper Paraná and Iguazú drainage — confirmed presence in the northeastern corner of Argentina near the Misiones/Chaco corridor.
Specific Spots
- Deep holes and channel edges in large rivers — the surubí holds in depth during daylight and moves shallower to feed at night.
- Current breaks behind submerged structure: sunken logs, rock piles, and river bends where flow slows and baitfish concentrate.
- Drop-offs at the edge of sandbars, where the bottom falls away quickly into the main channel — a classic ambush position for a fish hunting smaller species.
Mangrullo FAQ
Answers from onWater's species guide.
What are the best lures and bait for Mangrullo?
Live or cut baitfish are the traditional and most consistent approach, local river species rigged on large circle or J-hooks fished on the bottom or just above it. Large swimbaits and soft-plastic shad imitations worked slowly near the bottom cover the same feeding zone when live bait isn't available.
When is the best time to fish for Mangrullo?
Spring and early summer (September–December), fish become more active as river temperatures climb and pre-spawn movement begins. Summer (December–February), peak feeding activity; warm water pushes fish into shallower feeding zones at night.
How do you catch Mangrullo?
Most anglers fish from boats anchored or drifting over deep channel holes and drop-offs, presenting live or cut baitfish on the bottom. Night sessions are standard practice, as the fish moves out of deep water to feed after dark.
What do Mangrullo eat?
Primarily a fish-eater: it hunts smaller river fish, using its wide mouth and speed to strike prey. Match this with large swimbaits, live or cut fish, or big streamer flies that imitate baitfish profiles.
Where do Mangrullo live?
Native to the La Plata basin; in Argentina it occupies the Paraná River system, including the upper Paraná and the Iguazú drainage in the northeast. A bottom-oriented, migratory freshwater fish, it moves upriver to spawn and returns downstream, covering long stretches of large river.
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