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Nematobrycon palmeri, commonly known as the Emperor Tetra, is a small, characin fish native to the Atrato and San Juan river basins in western Colombia. It is highly prized in the aquarium trade for its striking coloration, particularly the iridescent blue-purple lateral stripe and the distinctive trident-shaped caudal fin in males. These fish are generally peaceful and exhibit interesting schooling behaviors, making them a popular choice for community aquariums.
Características físicas
- Formato do corpo
- elongated
- Coloração
- Males exhibit a prominent iridescent blue-purple lateral stripe extending from the snout to the caudal peduncle, often bordered by a dark stripe below. The body is generally brownish-silver to olive-green. Fins are often tinged with yellow or orange, and the caudal fin has a distinctive dark central ray extending beyond the fin margin, flanked by lighter areas. Females are generally less colorful, with a less pronounced lateral stripe and a more rounded body shape.
- Tipo de escama
- cycloid
- Posição da boca
- terminal
- Características distintivas
- Iridescent blue-purple lateral stripe (more prominent in males), Trident-shaped caudal fin in males (central ray extended), Orange/yellow fin coloration (especially in males), Dark stripe below the iridescent lateral stripe
- Nadadeira dorsal
- Single, relatively tall, often with a dark blotch or margin.
- Nadadeira caudal
- Trident-shaped in males, with the central rays extended into a point. More rounded in females.
- Nadadeira peitoral
- Small and clear.
- Nadadeiras características
- Adipose fin present, typical of characins.
Dicas de identificação
Lateral Stripe
Look for the prominent iridescent blue-purple stripe running along the flank, especially vibrant in males.
Caudal Fin (Tail Fin)
Observe the unique trident shape of the caudal fin in males, where the central rays extend beyond the rest of the fin.
Sexual Dimorphism
Males are generally more colorful, have a more pronounced lateral stripe, and possess the distinctive trident caudal fin. Females are plumper and less intensely colored.
Size
Adults typically reach a maximum standard length of 4-5 cm (1.6-2 inches).
Habitat
- Tipo de água
- freshwater
- Profundidade
- Typically found in shallow, slow-moving waters near the banks.
- Ambiente
- Inhabits clear to blackwater streams and tributaries, often with dense vegetation, leaf litter, and submerged roots. The water is typically soft and acidic.
- Distribuição geográfica
- Endemic to the Atrato and San Juan river basins in western Colombia, South America.
Informações sobre aquário
- Nível de cuidado: intermediate
- Temperamento: peaceful
- Alimentação: omnivore
- Tamanho mínimo do aquário: 60 liters (15 gallons) for a small school
- Temperatura: 23-27 °C (73-81 °F)
- Nível de pH: 5.5-7.5
- Dureza da água: 2-15 dGH
- Compatibilidade: Excellent for community tanks with other peaceful, similarly sized fish. Avoid housing with very large or aggressive species, or fin-nippers.
- Requisitos especiais: Requires a well-planted aquarium with some open swimming space. Dim lighting and a dark substrate can enhance their coloration. Best kept in schools of 6 or more individuals to reduce stress and encourage natural behavior. Males can be territorial towards each other, especially during breeding, but this is usually managed in a sufficiently large tank with plenty of hiding spots.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: Breeds year-round in suitable conditions, but wild populations may have seasonal peaks related to rainfall and food availability.
- Preço de mercado: Varies, typically low to moderate for individual fish
- Importância comercial: medium
- Sabor: Not typically consumed due to small size
- Textura: Not typically consumed due to small size
- Valor nutricional: Not typically consumed due to small size
Fatos principais
Imperial Displayinteresting
The common name 'Emperor Tetra' refers to the regal appearance of the males, particularly their vibrant coloration and distinctive caudal fin, which resembles a crown or trident.
Courtship Dancebehavior
During courtship, male Emperor Tetras will display intensely, flaring their fins and intensifying their colors to attract females. They often engage in elaborate 'dances' to impress potential mates.
Egg Scatterersbehavior
Emperor Tetras are egg-scattering spawners, meaning they release their eggs freely into the water column, often among fine-leaved plants, without parental care.
Sensitive to Water Qualityinteresting
While relatively hardy, Emperor Tetras thrive best in stable, clean water conditions. Poor water quality can lead to stress, disease, and dull coloration.
Informações de segurança
Seguro- Nível de segurança: safe
- Venenoso: Não
- Comestibilidade: not recommended
- Observações de manuseio: No specific handling precautions are required beyond standard fish care. They are small and delicate, so handle gently with a fine-mesh net if necessary.
Espécies similares
Black Emperor Tetra
Nematobrycon lacortei
N. lacortei has a more pronounced black lateral stripe and lacks the strong blue-purple iridescence of N. palmeri. The caudal fin extension in males of N. lacortei is typically less pronounced and often more uniformly dark.
Congo Tetra
Phenacogrammus interruptus
While also iridescent and popular, Congo Tetras are significantly larger (up to 8 cm), have a different body shape, and their finnage, particularly the dorsal and caudal fins, is much more elaborate and flowing, especially in males. They also originate from different geographic regions (Congo River basin, Africa).
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Characiformes
- Família
- Characidae
- Gênero
- Nematobrycon
- Espécie
- Nematobrycon palmeri
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