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Apri l'appDescrizione
Hasemania nana, commonly known as the Glowlight Tetra, is a small, active, and peaceful freshwater fish belonging to the family Characidae. It is highly valued in the aquarium trade for its striking coloration and schooling behavior. Unlike many other tetras, Hasemania nana lacks an adipose fin, a key distinguishing feature. Its body is slender and somewhat compressed laterally, exhibiting a characteristic coppery-orange to reddish-brown hue, accentuated by a prominent iridescent horizontal stripe that runs from the operculum to the caudal peduncle. This stripe, often described as 'glowing,' gives the fish its common name. Males are typically more intensely colored and slender than females, especially during breeding periods.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- Coppery-orange to reddish-brown body with a distinct iridescent horizontal stripe (gold to orange-red) running from the gill cover to the caudal peduncle. Fins are typically translucent, sometimes with a reddish tint, especially in males. A small, dark spot may be present at the base of the caudal fin.
- Tipo di squame
- cycloid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Absence of an adipose fin (a key characteristic differentiating it from many other tetras)., Prominent iridescent horizontal stripe., Males are generally more vibrant in color and slender than females.
- Pinna dorsale
- Single, relatively small, typically translucent with a reddish tint in males.
- Pinna caudale
- Forked, translucent, sometimes with a faint reddish hue.
- Pinna pettorale
- Small, clear, and fan-shaped.
- Pinne distintive
- Pelvic fins are small and clear. Anal fin is relatively long, extending from behind the pelvic fins to the caudal peduncle.
Consigli per l'identificazione
Adipose Fin Absence
The most reliable distinguishing feature is the complete lack of an adipose fin, which is present in most other tetra species. This can be observed by carefully examining the area between the dorsal and caudal fins.
Iridescent Stripe
The prominent, glowing, coppery-orange to reddish-gold horizontal stripe running along the lateral line is highly characteristic. The intensity of this stripe can vary with mood and lighting.
Body Coloration
The overall coppery-orange to reddish-brown body color, especially in mature males, is a good indicator. This coloration is often more subdued in females and stressed individuals.
Size
Adults typically reach a maximum standard length of 4-5 cm (1.6-2.0 inches), making them one of the smaller tetra species.
Habitat
- Tipo di acqua
- freshwater
- Profondità
- Typically found in shallow, slow-moving waters near the surface or mid-water column.
- Ambiente
- Native to clearwater and blackwater streams, rivers, and tributaries within the São Francisco River basin in Brazil. These environments are often characterized by dense aquatic vegetation, submerged roots, leaf litter, and sandy or muddy substrates. Water flow is generally gentle, and light penetration can be subdued due to riparian vegetation.
- Areale geografico
- Endemic to the São Francisco River basin in Minas Gerais, Brazil, South America.
Informazioni sull'acquario
- Livello di cura: beginner
- Temperamento: peaceful
- Dieta: omnivore
- Dimensione minima della vasca: 60 liters (15 gallons)
- Temperatura: 22-28°C (72-82°F)
- Livello di pH: 6.0-7.5
- Durezza: 5-15 dGH
- Compatibilità: Excellent for community aquariums with other peaceful, similarly sized fish such as other small tetras, rasboras, corydoras, and dwarf cichlids. Avoid housing with large or aggressive species that may prey on or harass them.
- Requisiti speciali: Requires a well-planted aquarium with open swimming spaces. Benefits from subdued lighting and a dark substrate to enhance its coloration. Best kept in schools of 6 or more individuals to reduce stress and encourage natural schooling behavior.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Breeds year-round in suitable conditions, with peak activity often observed during the rainy season in its natural habitat, which provides abundant food and softer water.
- Prezzo di mercato: Low to moderate
- Importanza commerciale: medium
- Sapore: Not applicable
- Consistenza: Not applicable
- Valore nutrizionale: Not applicable
Fatti chiave
No Adipose Fininteresting
Hasemania nana is one of the few tetra species that completely lacks an adipose fin, a small fleshy fin located between the dorsal and caudal fins, which is typically present in most characins.
Schooling Behaviorbehavior
These tetras are obligate schooling fish, meaning they thrive and exhibit their most natural behaviors when kept in groups of six or more individuals. This schooling instinct provides safety and enhances their visual appeal.
Sexual Dimorphisminteresting
Males are generally more intensely colored, especially the iridescent stripe, and are noticeably more slender than females, particularly when viewed from above.
Origin of Nameinteresting
The genus name 'Hasemania' honors the German ichthyologist Adolfo Haseman, who collected many fish species in South America. The species epithet 'nana' is Latin for 'dwarf,' referring to its small size.
Aquarium Popularityinteresting
Despite its relatively recent introduction to the aquarium hobby compared to some other tetras, its peaceful nature, vibrant coloration, and ease of care have made it a very popular choice for community tanks.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: not recommended
- Note sul maneggio: Hasemania nana is a small, delicate fish. Handle with care using a fine-mesh net to avoid injury to fins or scales. They are not known to bite or pose any threat to humans.
Specie simili
Glowlight Tetra (Hemigrammus erythrozonus)
Hemigrammus erythrozonus
While sharing a similar common name and iridescent stripe, Hemigrammus erythrozonus possesses an adipose fin, which Hasemania nana lacks. The stripe in H. erythrozonus is typically a more vibrant red and often extends into the caudal fin, whereas in H. nana, it is more coppery-orange and terminates at the caudal peduncle. H. erythrozonus also tends to have a more silvery body base.
Flame Tetra (Hyphessobrycon flammeus)
Hyphessobrycon flammeus
The Flame Tetra has a more compressed, deeper body shape and a distinct red coloration, particularly in the posterior half of the body and fins. It also possesses an adipose fin. While both can exhibit reddish hues, the iridescent stripe of Hasemania nana is a key differentiator.
Rosy Tetra (Hyphessobrycon rosaceus)
Hyphessobrycon rosaceus
Rosy Tetras are generally larger, have a deeper body, and exhibit a more pronounced rosy-pink coloration, especially in males. They also possess an adipose fin and often have black markings on their dorsal and anal fins, which are absent in Hasemania nana.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Characiformes
- Famiglia
- Characidae
- Genere
- Hasemania
- Specie
- Hasemania nana
Esplora Glowlight Tetra
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