Piranha preta
The piranha preta is the largest species in the genus Serrasalmus and a genuine target species across the Amazon and Araguaia-Tocantins basins.
Unlike the schooling red piranha, it tends to hunt alone, which makes locating a good fish a real exercise in reading water. Anglers fish it with simple rigs — raw meat or fish bait on a short wire trace — and the bite, when it comes, is unmistakable.
Scientific Name: Serrasalmus rhombeus
Also known as Piranha preta, black piranha, redeye piranha, piranha-preta
- Deep, diamond-shaped (rhomboid) body, laterally compressed, with a noticeably protruding lower jaw and triangular, serrated teeth — unmistakable in hand.
- Adults run uniformly dark gray to near-black on the back and sides; juveniles are paler with scattered dark spots that fade with age.
- Striking red iris — the feature that gives it the alternate name "redeye piranha" — stands out against the dark body.
- Largest of the Serrasalmus piranhas: typical adults reach around 30–40 cm, with max recorded length around 41.5 cm and weight up to roughly 3.8 kg.
What to know
Habitat Distribution
- Native to Brazil; found across the Amazon basin — including the Rio Negro, Solimões, and their tributaries — and the Araguaia-Tocantins drainage.
- Also present in the coastal rivers of northeastern Brazil, making it one of the more widely distributed piranha species in the country.
- Recorded from the Machado River basin and known from both blackwater (acidic, tea-colored) and whitewater (turbid, nutrient-rich) river systems — unusually tolerant of varying water chemistry.
- Uses a range of water types: main river channels, smaller streams, oxbow lakes, and seasonally flooded forest during high water.
Key Locations
- Rio Negro and its tributaries, Amazonas state — blackwater conditions and the fish's territorial behavior make this one of the most consistent places to target larger individuals.
- Solimões River near Manaus — tour operators run dedicated piranha fishing trips here, combining the fishery with wildlife watching.
- Araguaia River — anglers have reported good catches of piranha preta here; the river's clear water makes sight-fishing possible at times.
- Pantanal wetlands — while the red piranha dominates the Pantanal fishery, piranha preta are present in the river channels and guides know the specific spots where larger fish hold.
- Machado River basin, Rondônia — documented occurrence and part of the broader Amazon drainage where the species is regularly encountered.
Specific Spots
- Rapids and fast-water stretches hold adults — the current concentrates baitfish and the piranha preta stations itself at the edge of the flow where it can intercept prey without fighting the current.
- Deep holes and channel drop-offs in main rivers are productive, especially during low water when fish concentrate; guides on the Amazon and Solimões work these zones with bait dropped straight down.
- Flooded forest margins during the rainy season give the fish cover and a steady supply of terrestrial prey — fish the edge where open water meets submerged vegetation or timber.
- Near large predator fish: as one Pantanal guide put it, find where the big fish are feeding and the piranha preta won't be far away.
Piranha preta FAQ
Answers from onWater's species guide.
What are the best lures and bait for Piranha preta?
Raw meat, beef chunks or fresh fish fillet, is the traditional and most reliable bait across the Amazon and Pantanal; the blood and scent draw the fish in, and the tough texture stays on the hook through multiple bites.
When is the best time to fish for Piranha preta?
Rainy season (roughly November–April): fish disperse into flooded forest and margins, accessible from small boats working the forest edge, but individual fish can be harder to pin down.
How do you catch Piranha preta?
Most anglers fish from small boats or canoes, drifting or anchoring over deep holes and current edges and dropping baited hooks straight down or casting to structure. Shore fishing along river banks and flooded forest margins is also common, particularly during the rainy season when fish move into shallower water.
What do Piranha preta eat?
Primarily smaller fish, but documented prey includes crabs, aquatic insects, and occasionally lizards or small mammals that enter the water, raw fish or meat chunks on the hook directly imitate this carnivorous diet.
Where do Piranha preta live?
Native to Brazil; found across the Amazon basin, including the Rio Negro, Solimões, and their tributaries, and the Araguaia-Tocantins drainage. Also present in the coastal rivers of northeastern Brazil, making it one of the more widely distributed piranha species in the country.
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