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Hemigrammus rhodostomus, commonly known as the Rummy-nose Tetra, is a small, schooling freshwater fish belonging to the family Characidae. It is highly prized in the aquarium trade for its distinctive red coloration on the head and its characteristic black and white striped caudal fin. These fish are known for their peaceful nature and active schooling behavior, making them a popular choice for community aquariums. They are native to the Amazon basin and are typically found in blackwater or clearwater environments.
Características físicas
- Formato do corpo
- elongated
- Coloração
- The most striking feature is the bright red coloration on the anterior part of the head, extending from the snout to just behind the eyes, resembling a 'red nose'. The body is generally silvery-translucent, sometimes with a faint greenish or yellowish tint. The caudal fin (tail fin) has a distinctive black and white striped pattern, typically with three prominent black bands separated by two white bands. The dorsal, anal, and pectoral fins are largely transparent.
- Tipo de escama
- cycloid
- Posição da boca
- terminal
- Características distintivas
- Bright red coloration on the head (rostrum and operculum), Tri-banded black and white pattern on the caudal fin, Slender, torpedo-shaped body
- Nadadeira dorsal
- Single, relatively small dorsal fin located mid-body.
- Nadadeira caudal
- Forked caudal fin with a distinctive black and white striped pattern.
- Nadadeira peitoral
- Small, transparent pectoral fins located just behind the operculum.
- Nadadeiras características
- Adipose fin present, typical of characins, located between the dorsal and caudal fins.
Dicas de identificação
Head Coloration
Look for the intense, almost glowing red coloration on the snout and operculum. This is the most defining characteristic.
Caudal Fin Pattern
Observe the distinct black and white banding on the tail fin. This pattern is unique among commonly available tetras.
Body Shape and Size
They have a slender, elongated body, typically reaching an adult size of 4-5 cm (1.6-2 inches).
Schooling Behavior
In a healthy school, they exhibit tight, synchronized swimming, which is a good indicator of their species and well-being.
Habitat
- Tipo de água
- freshwater
- Profundidade
- Typically found in shallow to moderate depths of rivers and tributaries.
- Ambiente
- Native to blackwater and clearwater rivers, streams, and flooded forests. They prefer areas with dense vegetation, submerged roots, and leaf litter, which provide shelter and foraging opportunities. Water parameters in their natural habitat are often soft and acidic.
- Distribuição geográfica
- Native to South America, specifically the Amazon River basin. Found in tributaries of the Rio Negro, Rio Meta, and other river systems in Brazil, Colombia, and Venezuela.
Informações sobre aquário
- Nível de cuidado: intermediate
- Temperamento: peaceful
- Alimentação: omnivore
- Tamanho mínimo do aquário: 60 liters (15 gallons) for a small school
- Temperatura: 22-27°C (72-81°F)
- Nível de pH: 5.5-7.0
- Dureza da água: 2-10 dGH
- Compatibilidade: Excellent for community tanks with other peaceful, similarly sized fish such as other tetras, rasboras, dwarf cichlids, and corydoras. Avoid housing with large or aggressive species.
- Requisitos especiais: Requires a well-planted aquarium with open swimming spaces. Prefers subdued lighting and a dark substrate to enhance coloration. Benefits from driftwood and leaf litter to mimic natural blackwater conditions. Must be kept in schools of at least 6-10 individuals to thrive and exhibit natural schooling behavior, which also reduces stress.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: No specific seasonal behavior patterns are documented for wild populations beyond general reproductive cycles influenced by rainfall and water levels in their natural habitat.
- Preço de mercado: Low to moderate, depending on region and supplier.
- 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
The 'Drunkard's Nose'interesting
The common name 'Nariz de Bêbado' (Drunkard's Nose) in Portuguese refers to the bright red coloration on its head, reminiscent of a person who has consumed too much alcohol.
Indicator of Water Qualitybehavior
The intensity of the red coloration on their head can be an indicator of their health and water quality. A faded red nose often suggests stress or poor water conditions.
Tight Schoolersbehavior
Rummy-nose Tetras are renowned for their exceptionally tight schooling behavior, often moving as a single, coordinated unit, which is a defense mechanism against predators.
Blackwater Specialistsbehavior
They thrive in blackwater environments, characterized by soft, acidic water stained with tannins from decaying organic matter, which mimics their natural Amazonian habitat.
Informações de segurança
Seguro- Nível de segurança: safe
- Venenoso: Não
- Comestibilidade: not recommended
- Observações de manuseio: These are small, delicate fish. Handle with care using a fine-mesh net to avoid injury. They are not known to bite or pose any threat to humans.
Espécies similares
False Rummy-nose Tetra
Petitella georgiae
While also having a red nose and striped tail, the red coloration on P. georgiae typically does not extend as far back onto the operculum and is often less intense. The black bands on the caudal fin are usually less defined and may be more diffuse.
Bleeding Heart Tetra
Hyphessobrycon erythrostigma
The Bleeding Heart Tetra has a distinct red spot on its flank and lacks the prominent red nose and the specific black and white caudal fin pattern of H. rhodostomus.
Black Phantom Tetra
Hyphessobrycon megalopterus
Black Phantom Tetras are characterized by their dark body coloration and a distinct black spot behind the gill plate, completely lacking the red nose and striped tail of the Rummy-nose Tetra.
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Characiformes
- Família
- Characidae
- Gênero
- Hemigrammus
- Espécie
- Hemigrammus rhodostomus
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