Piraíba
A massive Amazonian catfish known for its long barbels and role as an apex predator.
The piraíba is a large catfish native to the Amazon and Orinoco river basins. It serves as a key food source in South America but faces population declines due to overfishing and habitat changes.
- Can grow up to 3.6 metres long and weigh 200 kg.
- Native to the Amazon and Orinoco river basins.
- Hunts toxic pufferfish and armored catfish.
- Spawns during high water periods between February and June.
- Overfishing has led to declining catch records.
What it is
The piraíba is a giant member of the catfish family Pimelodidae. Adults can reach lengths of 3.6 metres and weigh up to 200 kilograms, though most are smaller at around 1.2 metres. They possess a dark grey back that fades to a white belly. A distinctive feature is the pair of long whiskers called maxillary barbels, which can stretch past the dorsal fin. Juveniles display dark spots on their bodies. The name piraíba is reserved for specimens exceeding 1.6 metres, while smaller ones are called filhote.
Where it lives
This species inhabits the Amazon and Orinoco river systems, extending into the Guianas and northeastern Brazil. It thrives in both freshwater rivers and brackish estuaries. The fish prefers deep, fast-flowing channels with soft substrates. As they grow, they move between upstream spawning grounds and downstream estuarine feeding areas, completing a full life cycle within these connected waterways.
How it lives
As an apex predator, the piraíba hunts a wide variety of prey, including characins, cichlids, and other catfish. It is known to tackle dangerous items like toxic pufferfish and armored catfish. Young fish feed on plankton and insects before maturing. River dolphins occasionally attack them, often leaving the catfish crippled for scavengers. The species migrates extensively through the basin to find food and suitable habitats.
Breeding and life cycle
Reproduction occurs during rising water levels, typically from February to June. Eggs hatch into larvae that drift downstream as part of the plankton. These young fish feed on insect remains and plankton while drifting. They eventually settle in estuaries to mature before swimming back upstream to spawn, ensuring the next generation reaches the correct environments.
Fish and people
Locals value the piraíba as a primary food source, ranking it among the most important fish in the Brazilian Amazon. Overfishing has caused catch numbers to drop significantly. The skin provides gelatin, offering an alternative to bovine sources. Despite legends of man-eating incidents and attacks on swimmers, such accounts are often unreliable or exaggerated. Some individuals are kept in very large aquariums due to their size.
Status and threats
Populations are declining due to intense fishing pressure and habitat degradation. Dam construction blocks their migration routes, severely impacting their ability to reproduce. Mercury contamination poses additional risks to both the fish and the communities that consume them. Scientific understanding remains limited, though otolith analysis helps researchers track their movements and life stages.
Questions people ask about Piraíba
How big does a piraíba get?
They can reach 3.6 metres in length and weigh 200 kilograms. Most adults are smaller, averaging around 1.2 metres. The local name piraíba applies only to those larger than 1.6 metres.
What does a piraíba eat?
It is a top predator that eats various fish, including characins and cichlids. It even tackles dangerous prey like toxic pufferfish and stingrays. Young fish start by eating plankton and insects.
Is the piraíba dangerous to humans?
Legends claim it attacks people, but these stories are often unreliable. One account describes a fisherman swallowed head-first, yet details were vague. It is primarily feared by swimmers due to its ambush hunting style.
Why are piraíba populations declining?
Overfishing is the main cause, with catches dropping significantly. Dams block their migration routes, preventing them from reaching spawning grounds. Habitat degradation also harms their survival.
Good reading and sources
- Brachyplatystoma filamentosum on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Brachyplatystoma filamentosum", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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