Red-bellied Piranha (Pygocentrus nattereri) Care Guide
The most iconic piranha species with a silvery body, red-orange belly, and powerful jaws filled with razor-sharp teeth. Despite their fearsome reputation, they are often shy in aquariums.
Compiled by Aquairi from published sources · Published · Updated
Overview
Pygocentrus nattereri is a species in the family Serrasalmidae. The most iconic piranha species with a silvery body, red-orange belly, and powerful jaws filled with razor-sharp teeth. Despite their fearsome reputation, they are often shy in aquariums. Must be kept in species-only groups in very large tanks.
Taxonomy
- Family: Serrasalmidae
- Genus: Pygocentrus
- Scientific name: Pygocentrus nattereri
- Other names: Red Piranha, Natterer's Piranha
- Origin: South America, Amazon Basin, Paraguay
Habitat
Pygocentrus nattereri is a shoaling characin from the Amazon and Paraguay basins of South America. It inhabits slow rivers and floodplains and is an opportunistic predator and scavenger; it shoals partly for protection rather than coordinated hunting.
Tank requirements
- Minimum tank volume: 400 L
- Temperature: 24-28 °C
- pH: 5.5-7.5
- GH: 4-18 °dGH
- Water flow: moderate
- Adult size: 20-33 cm
- Lifespan: 10-20 years
- Recommended group size: ≥ 5
- Difficulty: advanced
Diet
Classified as carnivore. Recommended feeding frequency: 1x daily. In captivity, offer a varied diet appropriate to the species — quality prepared foods supplemented with frozen or live items of suitable size.
Compatibility
- Temperament: aggressive
- Position in tank: middle
- Compatible tank mates: Other Red-bellied Piranhas
- Avoid with: Any Other Species
Breeding
- Breeding strategy: egg-scatterer
- Breeding difficulty: advanced
Red-bellied Piranha Breeding Guide
Overview
The red-bellied piranha, Pygocentrus nattereri, is relatively easy to breed in the aquarium and has been spawned successfully in captivity. It is a substrate-pit spawner in which the male prepares and guards the nest, with eggs deposited on submerged vegetation. Fish reach sexual maturity at around a year of age and 100-150 mm total length.
Sexing
The sexes are not reliably distinguished externally, so a group of six or more is normally kept to allow pairs to form naturally. Both sexes adopt a darker body colouration when in breeding condition.
Conditioning
Maintain the group well and let pairs establish. Spawning can be triggered by large, cool water changes, or pairs may spawn spontaneously without any particular intervention.
Breeding Setup
Provide a substrate the male can excavate and submerged or newly flooded vegetation for egg attachment; in the wild males build nests around 4-5 cm deep among water grasses. Because aquatic plants may be eaten or uprooted during nest preparation, robust or replaceable planting is sensible.
Spawning Behavior & Trigger
In breeding condition the male uses its mouth and tail to create a pit at the centre of its chosen site and defends it against rivals. Eggs are deposited on the vegetation in several batches; in the wild a female may lay around 5,000 eggs on newly submerged plants. Both sexes perform nuptial swimming displays, circling side by side around the nest.
Egg & Fry Care
The eggs are guarded by the male, sometimes assisted by the female, and hatch in about two to three days, with the fry free-swimming by around the fifth day. Move the young to smaller, sponge-filtered setups and feed them daily on Artemia nauplii or microworm with daily water changes of around ten percent.
Common Challenges
The fry become increasingly cannibalistic as they grow and must be separated by size into progressively larger aquaria. Adults are large and best maintained as a species-only group in a very large tank; the male's nest-guarding aggression must also be managed during the spawning period.