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Phractocephalus hemioliopterus, commonly known as the Redtail Catfish, is a large, predatory freshwater catfish native to South America. It is characterized by its distinctive coloration, robust body, and prominent barbels. This species is highly sought after in the aquarium trade, particularly when young, but its immense adult size makes it unsuitable for most home aquariums. In its natural habitat, it plays a significant role as an apex predator.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- The dorsal surface is typically dark grey to black, transitioning to a white or cream-colored ventral surface. The most striking feature is the bright orange to red coloration of the caudal fin (tail) and often the adipose fin, which gives the fish its common name. Juveniles may have more pronounced black spots or blotches on their flanks, which tend to fade with age.
- Tipo di squame
- none
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Large, broad, flattened head, Three pairs of prominent barbels: one pair of maxillary barbels extending past the pectoral fins, and two pairs of mental barbels on the chin, Bright orange to red caudal fin, Absence of scales, Large, wide mouth
- Pinna dorsale
- Short-based, with a single strong spine and 6-7 soft rays. Positioned relatively far forward on the body.
- Pinna caudale
- Deeply forked, with a vibrant orange to red coloration.
- Pinna pettorale
- Large and powerful, with a strong, serrated spine and several soft rays. Used for propulsion and defense.
- Pinne distintive
- A prominent adipose fin is present, often also colored orange/red. Pelvic fins are relatively small.
Consigli per l'identificazione
Coloration
The most definitive feature is the bright orange to red caudal fin, contrasting sharply with the dark grey/black dorsal and white ventral body.
Head Shape and Barbels
Its broad, flattened head and three pairs of long, prominent barbels (especially the maxillary pair) are unmistakable.
Size
Adults are massive, reaching lengths of up to 1.8 meters (6 feet) and weights exceeding 80 kg (176 lbs), making them one of the largest freshwater fish in South America.
Habitat
- Tipo di acqua
- freshwater
- Profondità
- Typically found in deeper channels of large rivers, but also moves into flooded forests and plains during high water seasons.
- Ambiente
- Large rivers, tributaries, and flooded forest areas. Prefers areas with slow to moderate currents, often near submerged logs, root systems, or undercut banks that provide cover. Juveniles may inhabit shallower, more vegetated areas.
- Areale geografico
- Native to the Amazon and Orinoco river basins in South America, including countries such as Brazil, Peru, Ecuador, Colombia, Venezuela, and Bolivia.
Informazioni sull'acquario
- Livello di cura: expert
- Temperamento: aggressive
- Dieta: carnivore
- Dimensione minima della vasca: 2000 gallons (7570 liters) for an adult specimen, though even larger is preferable due to its growth potential.
- Temperatura: 72-82°F (22-28°C)
- Livello di pH: 6.0-7.5
- Durezza: 2-15 dGH
- Compatibilità: Only compatible with other very large, robust fish that cannot be swallowed. Best kept as a solitary specimen in a dedicated large predator tank.
- Requisiti speciali: Requires an extremely large aquarium with powerful filtration to handle its significant bioload. Substrate should be soft sand or fine gravel to protect its delicate barbels. Ample open swimming space is crucial, along with some large, smooth hiding spots (e.g., large PVC pipes, smooth rocks). Excellent water quality and regular large water changes are paramount. Due to its predatory nature, tank mates must be chosen with extreme caution, if at all.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Spawning typically occurs during the rainy season when water levels rise and flood plains become accessible, providing suitable breeding grounds and abundant food for fry.
- Prezzo di mercato: Varies significantly based on size and region, but juveniles are commonly traded for the aquarium hobby. Larger specimens can command higher prices for public aquariums or specialized collectors.
- Importanza commerciale: medium
- Sapore: Reported to have a mild, somewhat firm white flesh.
- Consistenza: Firm, flaky.
- Metodi di cottura: fried, grilled, baked, stewed
- Valore nutrizionale: Good source of protein and omega-3 fatty acids, typical of many freshwater fish.
Fatti chiave
Giant of the Amazonrecord
The Redtail Catfish is one of the largest freshwater fish in South America, capable of reaching lengths of nearly 2 meters and weights over 80 kg.
Apex Predatorbehavior
In its natural habitat, Phractocephalus hemioliopterus is an apex predator, feeding on a wide variety of fish, crustaceans, and even fallen fruits.
Aquarium Misconceptioninteresting
Despite its immense adult size, juvenile Redtail Catfish are popular in the aquarium trade, often leading to owners being unprepared for their rapid growth and eventual tank requirements.
Distinctive Tailamazing
The species name 'hemioliopterus' refers to its distinctive half-red, half-black tail fin, a key identification feature.
Informazioni di sicurezza
Maneggiare con cura- Livello di sicurezza: caution
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: While not venomous, Redtail Catfish possess strong, serrated pectoral fin spines that can inflict painful wounds if handled carelessly. Their large size and powerful thrashing can also cause injury. Extreme caution should be exercised when handling, especially larger specimens. Use thick gloves and appropriate tools if necessary. Their large mouth can also deliver a powerful bite.
Specie simili
Tiger Shovelnose Catfish
Pseudoplatystoma tigrinum
The Tiger Shovelnose has a more elongated, slender body with distinct tiger-like stripes or spots, and a more pointed snout. It lacks the bright red tail of the Redtail Catfish.
Marbled Catfish
Leiarius marmoratus
While also a large South American catfish, Leiarius marmoratus has a marbled or mottled pattern on its body and lacks the distinctive red tail. Its head shape is also generally less broad and flattened than Phractocephalus hemioliopterus.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Siluriformes
- Famiglia
- Pimelodidae
- Genere
- Phractocephalus
- Specie
- hemioliopterus
Esplora Redtail Catfish
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