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The Black Phantom Tetra (Hyphessobrycon megalopterus) is a small, characin fish native to South America. It is highly valued in the aquarium trade for its striking coloration, peaceful demeanor, and schooling behavior. Males display more intense coloration and larger, more elaborate fins, particularly the dorsal fin, which is a key sexual dimorphism. They are known for their distinctive black spot behind the gill plate and a subtle, iridescent body sheen.
Caratteristiche fisiche
- Forma del corpo
- compressed
- Colorazione
- Males typically exhibit a dark, almost black body with a prominent black humeral spot (behind the gill plate) and a white or light-colored stripe above it. Their dorsal, anal, and pelvic fins are often elongated and black, sometimes with white tips. Females are generally lighter, with a brownish-grey body, a less intense black humeral spot, and reddish pelvic and adipose fins. Both sexes have a subtle iridescent sheen that can appear bluish or purplish under certain lighting.
- Tipo di squame
- cycloid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Prominent black humeral spot, Sexual dimorphism in fin size and coloration (males with larger, darker fins), Subtle iridescent body sheen, Adipose fin present
- Pinna dorsale
- Males possess a significantly elongated, sail-like dorsal fin, typically black. Females have a shorter, more rounded dorsal fin.
- Pinna caudale
- Forked caudal fin, translucent to slightly dusky.
- Pinna pettorale
- Small, clear, and fan-shaped.
- Pinne distintive
- The adipose fin is present, a characteristic of characins. Pelvic fins are often black in males and reddish in females.
Consigli per l'identificazione
Humeral Spot
Look for the distinct, dark black spot located just behind the gill cover. This is a key identifying feature for both sexes.
Fin Morphology (Males vs. Females)
Males have significantly larger, more elongated, and darker dorsal, anal, and pelvic fins compared to females. Females often have reddish pelvic and adipose fins.
Body Coloration
Males are generally darker, almost black, while females are a lighter brownish-grey. Both have a subtle iridescent sheen.
Schooling Behavior
They are typically found in schools. Observing their schooling patterns can help confirm identification in their natural habitat.
Habitat
- Tipo di acqua
- freshwater
- Profondità
- Typically found in shallow to moderate depths of slow-moving waters.
- Ambiente
- Native to the Guaporé and Paraguay River basins in Brazil and Bolivia. They inhabit clear to blackwater streams, tributaries, and flooded forest areas. These environments are often characterized by dense vegetation, leaf litter, submerged roots, and soft, acidic water. They prefer areas with plenty of hiding spots and subdued lighting.
- Areale geografico
- South America, specifically the Guaporé and Paraguay River basins in Brazil and Bolivia.
Informazioni sull'acquario
- Livello di cura: beginner
- Temperamento: peaceful
- Dieta: omnivore
- Dimensione minima della vasca: 60 liters (15 gallons) for a small school
- Temperatura: 22-28°C (72-82°F)
- Livello di pH: 5.5-7.5
- Durezza: 2-15 dGH
- Compatibilità: Excellent for community tanks with other peaceful, similarly sized fish such as other tetras, rasboras, corydoras, and small peaceful cichlids. Avoid housing with fin-nipping species or very large, aggressive fish.
- Requisiti speciali: Requires a well-planted aquarium with open swimming spaces and subdued lighting. They thrive in schools of 6 or more individuals, which helps reduce stress and encourages natural schooling behavior and coloration. A dark substrate and floating plants can enhance their colors and provide a sense of security.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Breeds year-round in suitable conditions, with peak activity often coinciding with rainy seasons in their natural habitat.
- Prezzo di mercato: Low to moderate for aquarium trade
- Importanza commerciale: medium
- Sapore: Not typically consumed
- Consistenza: Not typically consumed
- Valore nutrizionale: Not typically consumed
Fatti chiave
Sexual Dimorphismbehavior
Male Black Phantom Tetras are easily distinguished by their significantly larger, more elongated, and darker dorsal, anal, and pelvic fins compared to females, which have shorter, rounder fins and often reddish pelvic fins.
Schooling Behaviorbehavior
These tetras are obligate schooling fish and exhibit their best coloration and natural behaviors when kept in groups of at least six individuals. This also helps to reduce stress and aggression.
Courtship Displaybehavior
During courtship, male Black Phantom Tetras engage in elaborate fin displays, often flaring their large dorsal and anal fins to attract females and establish dominance within the school.
Habitat Mimicryinteresting
To encourage optimal health and coloration in captivity, aquarists often replicate their natural blackwater habitat using peat filtration, Indian almond leaves, or other tannins to lower pH and add a subtle tea stain to the water.
Etymologyinteresting
The specific epithet 'megalopterus' is derived from Greek, meaning 'large finned,' referring to the prominent fins of the male.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: not recommended
- Note sul maneggio: No specific handling precautions are required beyond standard fish care. They are small and harmless. Avoid sudden movements or loud noises when near their tank, as they can be easily startled.
Specie simili
Black Skirt Tetra
Gymnocorymbus ternetzi
The Black Skirt Tetra is generally larger, has a more compressed, disc-shaped body, and lacks the distinct humeral spot of the Black Phantom Tetra. Its black coloration is more uniform and extends over a larger portion of its body, especially the posterior half, and its fins are typically larger and more flowing.
Red Phantom Tetra
Hyphessobrycon sweglesi
The Red Phantom Tetra is very similar in body shape and fin structure, including the prominent humeral spot. However, its body coloration is distinctly reddish-orange, especially in males, and its fins are typically red, contrasting with the darker, blackish coloration of H. megalopterus.
Serpae Tetra
Hyphessobrycon eques
Serpae Tetras have a more intense red body coloration and a less distinct, often more elongated, black humeral spot. Their body shape is also slightly more robust, and their fins are typically red with black markings, differing from the predominantly black fins of male Black Phantoms.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Characiformes
- Famiglia
- Characidae
- Genere
- Hyphessobrycon
- Specie
- megalopterus
Esplora Black Phantom Tetra
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