Hai una foto? Identifica i pesci all'istante con l'app Fishby.
Apri l'appDescrizione
Pygocentrus nattereri, commonly known as the Red-bellied Piranha, is a freshwater fish native to South American rivers. It is one of the most well-known and iconic piranha species, often associated with its aggressive reputation, though much of this is exaggerated. They are characterized by their robust body, powerful jaws, and distinctive reddish coloration on their ventral side. They are opportunistic feeders, primarily scavenging and preying on weaker or injured animals, and play a crucial role in their ecosystem as scavengers and predators.
Caratteristiche fisiche
- Forma del corpo
- compressed
- Colorazione
- Adults typically exhibit a silvery-grey body with a distinct reddish-orange coloration on the belly, extending from the throat to the anal fin. The operculum (gill cover) often has a golden sheen. Juveniles are more silvery with black spots, which fade with age.
- Tipo di squame
- cycloid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Deep, laterally compressed body, Prognathous lower jaw with a single row of razor-sharp, triangular, interlocking teeth, Strong, muscular build, Reddish ventral coloration in adults
- Pinna dorsale
- Single, relatively short dorsal fin located mid-body, typically with 16-18 rays.
- Pinna caudale
- Caudal fin is forked, often with a dark band at the base.
- Pinna pettorale
- Pectoral fins are relatively small and rounded.
- Pinne distintive
- Adipose fin present, characteristic of characiforms.
Consigli per l'identificazione
Body Coloration
Look for the distinctive reddish-orange belly in adults, contrasting with a silvery-grey body. Juveniles are more silvery with black spots.
Jaw and Teeth
Observe the prominent, prognathous lower jaw and the single row of sharp, triangular, interlocking teeth, which are characteristic of Pygocentrus species.
Body Shape
Note the deep, laterally compressed body shape, typical of piranhas.
Adipose Fin
Presence of a small, fleshy adipose fin between the dorsal and caudal fins, a key feature of characiforms.
Habitat
- Tipo di acqua
- freshwater
- Profondità
- Typically found in shallow to moderate depths, often near submerged vegetation or fallen trees.
- Ambiente
- Slow-moving rivers, oxbow lakes, floodplains, and reservoirs. Prefers areas with dense aquatic vegetation, submerged roots, and muddy or sandy bottoms, providing cover and ambush opportunities.
- Areale geografico
- Widespread throughout the major river basins of South America, including the Amazon, Orinoco, Paraguay, and Paraná River systems. Found in countries such as Brazil, Argentina, Bolivia, Colombia, Ecuador, Guyana, Paraguay, Peru, Uruguay, and Venezuela.
Informazioni sull'acquario
- Livello di cura: advanced
- Temperamento: aggressive
- Dieta: carnivore
- Dimensione minima della vasca: 150 gallons (570 liters) for a small group
- Temperatura: 24-28°C (75-82°F)
- Livello di pH: 6.0-7.5
- Durezza: 5-15 dGH
- Compatibilità: Best kept in a species-specific tank or with other large, robust, and fast-moving fish that can withstand their aggression, though this is generally not recommended. They are typically kept in groups of 5 or more to diffuse aggression among themselves.
- Requisiti speciali: Requires excellent filtration due to their messy eating habits. A secure lid is essential as they can jump. Provide plenty of hiding spots with driftwood and robust plants. Live or frozen meaty foods are preferred. Avoid keeping with smaller or slower tank mates.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Breeding typically occurs during the rainy season (November to April) when water levels are high and food is abundant. Feeding activity can increase during dry seasons as prey become concentrated.
- Prezzo di mercato: Varies, generally low for food fish, moderate for aquarium trade
- Importanza commerciale: low
- Sapore: Mild, somewhat earthy
- Consistenza: Flaky, white meat
- Metodi di cottura: Frying, Grilling, Baking, Stewing
- Valore nutrizionale: Good source of protein and omega-3 fatty acids.
Fatti chiave
Reputation vs. Realityinteresting
Despite their fearsome reputation, Red-bellied Piranhas are primarily scavengers and opportunistic predators. Attacks on healthy, live animals are less common than often portrayed in popular culture. They are more likely to scavenge on dead or dying animals.
Schooling Behaviorbehavior
Pygocentrus nattereri typically lives in schools, especially when young. This schooling behavior is primarily a defense mechanism against larger predators like caimans and river dolphins, rather than solely for coordinated hunting.
Powerful Jawsamazing
Their interlocking, triangular teeth are incredibly sharp and backed by powerful jaw muscles, allowing them to shear through flesh and bone with ease. They can exert a bite force disproportionately strong for their size.
Sound Productionbehavior
Piranhas are known to produce various sounds, particularly when caught or during aggressive encounters. These sounds are generated by the rapid contraction of muscles attached to the swim bladder.
Ecological Roleinteresting
As efficient scavengers, Red-bellied Piranhas play a vital role in their ecosystem by cleaning up carcasses and preventing the spread of disease, thus contributing to the overall health of the aquatic environment.
Informazioni di sicurezza
Pericoloso- Livello di sicurezza: dangerous
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: Extreme caution is advised when handling due to their powerful jaws and razor-sharp teeth. Bites can cause severe lacerations and tissue damage. Use thick gloves and appropriate tools (e.g., fish grippers) if handling is absolutely necessary. Avoid putting hands or feet in waters known to contain large populations, especially if there are open wounds or splashing. While attacks on humans are rare and often exaggerated, they can occur, particularly if the fish feel threatened or if food is scarce.
Specie simili
Black Piranha
Serrasalmus rhombeus
Generally larger, darker coloration (often black or dark grey), and a more robust, less compressed body. The eye is typically reddish, and the teeth are more conical and less interlocking than Pygocentrus nattereri.
Wimple Piranha
Catoprion mento
Distinguished by its unique feeding strategy of scale-eating (lepidophagy) and a more elongated snout. It lacks the prominent red belly of P. nattereri.
Gold Piranha
Pygocentrus cariba
Found primarily in the Orinoco basin. While similar in body shape and teeth, P. cariba typically has a more golden or yellowish hue, especially on the flanks, and often a distinct black humeral spot (shoulder spot) which is usually absent or less pronounced in P. nattereri.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Characiformes
- Famiglia
- Serrasalmidae
- Genere
- Pygocentrus
- Specie
- nattereri
Esplora Red-bellied Piranha
Identifica pesci ovunque
Gratis su iOS, Android e Web. Identificazione tramite foto, dettagli completi sulle specie e molto altro.