Pimelodidae (Long-whiskered Catfishes)

False Piraíba

Brachyplatystoma capapretum

The False Piraíba, scientifically named Brachyplatystoma capapretum, belongs to the family Pimelodidae, also known as long-whiskered or flat-headed catfishes. This large predatory fish is often found in public aquariums and among some experienced hobbyists. Its keeping is not recommended for beginner aquarists.

Tank
from 1000 L (264 gal)
Temperature
22 – 28 °C (72 – 82 °F)
Size in aquarium
90 cm (35 in)
Acidity
pH 6–8

Predator: dangerous to small fish

Natural rangeRange on the map
  • South America area
  • Brazil
  • Peru

Tank conditions

Plan the tank stocking
Temperature
22 – 28 °C (72 – 82 °F)
Water pH
Slightly acidic (6) – Slightly alkaline (8)
Water dH
Very soft (1) – Very hard (21)
Water salinity
no salt (freshwater)
Size in aquarium
90 cm (35 in)
Lifespan
15 years
Temperament
Predator, but semi-peaceful gets along with large ones
Toward small fish
predator
Required aquarium volume
from 1000 L (264 gal)
Lighting
dimmed
Substrate
coarse sand coarse sand / gravel / pebbles
Water flow
any
Feeding
Meat / protein live, frozen, fresh
Keeping
Both solitary and in group flexible
  • Lifespan. A lifespan to expect under good care, not a measured value: it depends heavily on tank volume, water quality and diet — and for selectively bred forms, on their origin as well.
  • Toward small fish. Based on the Predators category in the catalog or the temperament in the species parameters. “A risk to small fish” means the species is not a predator by habit, yet will swallow any fish that fits in its mouth.
  • Required aquarium volume. This is a husbandry recommendation, not a measured value: the volume depends on the keeping mode (both solitary and in group (flexible)), footprint, decor and tank mates.

Care and keeping

Description

In natural conditions, adult specimens can reach lengths of about 90 cm or more, but in the confined space of an aquarium, their growth is usually somewhat less. This species is a close relative of the Piraíba, another well-known Amazonian catfish. At a young age, they are very similar: both species have a gray back with large dark spots and a light belly. However, as it matures, the False Piraíba changes noticeably, acquiring a more uniform light gray coloration with a fine speckled pattern. Sexual dimorphism in these fish is weakly expressed, and no noticeable external differences between males and females are observed.

Habitat

The natural habitat of this catfish is South America, where it is widely distributed throughout the entire Amazon River basin. The False Piraíba prefers to stay in the bottom layers of deep river channels. The vastness of its habitats indicates that the catfish is not tied to a specific biotope and successfully lives in both standing water bodies and areas with fast currents.

Behavior and Compatibility

Despite its predatory nature, this catfish exhibits a rather peaceful disposition towards other fish species of comparable size. However, any fish small enough to fit into its mouth will inevitably be eaten.

Care and Maintenance

For the successful keeping of this catfish, very large aquariums are necessary, starting from a thousand liters, equipped with appropriate powerful equipment. The fish look most harmonious in subdued lighting conditions, among large snags, and also piles of stones and boulders. It should be noted that the total weight of such a structure, including decor, can reach several tons, which often requires construction work and the arrangement of engineering communications. Maintaining such an aquarium involves significant time and financial costs. In view of all the above, it is obvious that the False Piraiba is not among the popular home aquarium fish.

Diet

This species is carnivorous. In the wild, it actively hunts small prey, but also does not disdain carrion and the remains of other animals' food. In aquarium conditions, the False Piraiba can be accustomed to consuming a variety of alternative foods. These include shrimp, mussel meat, squid, pieces of fish, as well as specialized commercial feeds.

Breeding and Reproduction

This species does not breed in aquarium conditions. Fry caught from natural bodies of water are usually offered for sale.

Diseases

Most health problems in fish often arise from unsuitable keeping conditions. Maintaining a stable and comfortable habitat is a key factor for successful keeping. If symptoms of illness appear, the first step is to check the water quality. If deviations are found, it is important to take immediate measures to eliminate them. If the symptoms do not disappear or worsen, medicinal treatment may be required.

How to choose

When selecting specimens, preference should be given to active fish with clean skin without signs of damage, ulcers, or fungal growths. Given the species' timidity, in the store, fish often injure their rostrum and fins against the aquarium walls when startled, so it is important to carefully inspect the mouth area and fin tips for wounds. Avoid purchasing specimens with sunken bellies or unnaturally bloated abdomens, as well as fish that constantly lie motionless on the bottom. Due to the large size of adult specimens, before purchasing, it is necessary to ensure that you can provide them with suitable living conditions, as this species requires enormous volumes of water.

Compatibility

There are no pair reviews for this species yet — check tankmates in the matcher.

All tankmates

Plants and this fish

Matching water does not mean the plant will stay intact.

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does False Piraíba get?

An adult reaches 90 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does False Piraíba need?

The recommended volume is 1000 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does False Piraíba need?

Temperature 22–28 °C, pH 6–8, hardness 1–21 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does False Piraíba live?

Around 15 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is False Piraíba aggressive?

Temperament: predator, but semi-peaceful (gets along with large ones). This is a predatory species — any fish small enough to fit in its mouth will eventually be eaten.

How many False Piraíba should be kept together?

Recommended setup: both solitary and in group (flexible). Ignoring this is a common cause of stress and disease.

What does False Piraíba eat?

Diet type: meat / protein (live, frozen, fresh). Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of False Piraíba?

The scientific name of the species is Brachyplatystoma capapretum, family Pimelodidae (Long-whiskered Catfishes).

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Other scientific names and conservation status

Categories
Catfish, Giants
Conservation status
Near threatenedNT