Piraya Piranha Care Guide
Pygocentrus piraya is the largest piranha species, endemic to the São Francisco River basin in Brazil and kept only in very large tanks.
Compiled by Aquairi from published sources · Published · Updated
Overview
Pygocentrus piraya is a serrasalmid fish endemic to the São Francisco River basin in Brazil. It is recognised as the largest of the piranhas, with a yellow to orange belly and silver flanks. The species was described by Cuvier in 1819 and is kept only by experienced aquarists in very large aquariums.
Taxonomy
- Family: Serrasalmidae
- Genus: Pygocentrus
- Scientific name: Pygocentrus piraya
- Order: Characiformes
Habitat
The species is endemic to the São Francisco River basin in eastern Brazil, where it inhabits freshwater channels of this isolated drainage. FishBase classifies it as a tropical, pelagic freshwater fish occupying open water of the river system.
Tank requirements
- Minimum tank volume: 800 L
- Temperature: 22-28 °C (72-82 °F)
- pH: 6.0-7.5
- GH: 5-18 °dGH
- School size: 4 or more individuals
- Lifespan: 15-25 years
Diet
Pygocentrus piraya is a predatory carnivore. In the wild it takes mainly small fish and insects, supplemented by seeds and plant material, placing it at an upper-middle trophic level around 3.7 according to FishBase. In captivity it is fed meaty foods two times daily.
Compatibility
This is an aggressive, middle-water schooling predator that shows heightened aggression when hungry or stressed. It is best kept in a single-species group of its own kind; small or slow tankmates are eaten and should be avoided.
Conservation status
IUCN Red List: Least Concern. FishBase notes high resilience with a minimum population doubling time of less than 15 months.
Piraya Piranha (Pygocentrus piraya) Breeding Guide
Overview
Pygocentrus piraya is one of the largest piranhas, reaching a maximum length of about 50 cm in the wild, and is found in the Sao Francisco River basin in Brazil within the family Serrasalmidae (Wikipedia). According to Wikipedia, it is not generally bred in captivity, so aquarium pirayas are usually imported from South America and can be expensive.
Sexing
Reliable external sexing characters for P. piraya were not present in the opened sources; like other Pygocentrus, it is hard to sex visually outside the breeding season.
Breeding Setup
No species-specific captive breeding setup is documented for P. piraya, which Wikipedia states is not generally bred in captivity. Based on the genus Pygocentrus pattern documented for the red-bellied piranha (P. nattereri), males dig shallow nests about 4-5 cm deep among water grasses, indicating a spacious tank with dense marginal planting would be required (Wikipedia).
Spawning Behavior & Trigger
Applying the genus pattern documented for P. nattereri: spawning is rainfall-triggered, pairs perform nuptial displays, and the female lays several thousand adhesive eggs onto water plants (Wikipedia). This is presented as a genus-level inference because P. piraya is not generally bred in captivity and species-specific data were not located.
Egg & Fry Care
Per the genus pattern (P. nattereri), both parents guard the nest, eggs hatch within two to three days, and juveniles shelter among plants until able to defend themselves (Wikipedia). Species-specific egg and fry data for P. piraya were not available.
Common Challenges
Because P. piraya is the largest piranha and is not generally bred in captivity (Wikipedia), the chief obstacles are its enormous space requirements, aggression, and the absence of a documented species-specific spawning protocol; the data above are inferred from the genus pattern.