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Hyphessobrycon melanostichos is a small Brazilian characid valued for its elegant shape and broad black longitudinal stripe, which contrasts with fins that may show reddish tones. Described at the beginning of the twenty-first century, this tetra remains less widespread than several popular species in the same genus, making it appealing to aquarists looking for something distinctive. It comes from the rio Madeira basin, where it inhabits warm, soft and generally acidic water. In an aquarium, it should be kept in a group, in stable, well-oxygenated water with abundant vegetation and peaceful tank mates. Its limited commercial availability gives it added interest for dedicated fishkeepers.

General species description

Hyphessobrycon melanostichos is a small schooling fish in the genus Hyphessobrycon, adapted to forest streams in southern Amazonia. Its main visual feature is a strong black lateral stripe, set against a silvery to slightly olive body. Like many tetras, it displays better colour and more natural behaviour when kept in a group of at least eight to ten individuals. It is peaceful and generally occupies the middle level of the aquarium. Its commercial availability is moderate: it can be found through specialized retailers, but it is not as common as the most widely produced aquarium tetras. This limited availability makes it attractive to Canadian aquarists looking for a less familiar Amazonian species. The wild-collected fish should be acclimated carefully, especially after long transportation. Gentle handling, stable water quality and a mature aquarium are important during the first weeks after arrival.

Geographic origin and biotope

Hyphessobrycon melanostichos comes from Brazil, in the upper rio Madeira basin, more specifically the rio Aripuanã drainage. Its habitat includes small tributaries and calm or moderately flowing sections surrounded by forest. The water is generally soft, low in dissolved minerals and acidic to slightly acidic, with a stable tropical temperature. Wooded banks provide shade, while roots, branches and leaf litter create shelter and feeding areas. In the aquarium, a dark layout with plants and some driftwood helps reproduce this atmosphere. Efficient filtration with gentle circulation is more suitable than strong, continuous flow. Its naturally restricted distribution contributes to its rarity rating of 2, meaning that it is relatively uncommon in the trade. Regular maintenance and restrained stocking help preserve the clean-water conditions this tetra needs.

Precise locality and local name

The reference locality for Hyphessobrycon melanostichos is the rio Aripuanã, a tributary of the rio Madeira in Brazil. This region contains many small Amazonian waterways where habitats can be divided by dense streamside vegetation and seasonal changes in water level. The most commonly used trade name is Blackline Tetra; in French-speaking trade, it may be called the Black-striped Tetra or Tétra à ligne noire. This species is wild collected and remains a specialized offering. It is also available exclusively from Ton.Fish in Canada, making it a particularly distinctive choice for aquarists interested in Amazonian fish with a specific geographic origin. The common name directly describes its easiest identifying feature: the dark stripe running along the side of the body.

Appearance and physical characteristics

The body of Hyphessobrycon melanostichos is elongated, laterally compressed and covered with the small scales typical of characids. A black longitudinal stripe runs along the side and is the most recognizable visual feature. The back is usually greyish olive to brownish, while the lower body is paler and silvery. The fins may show red or orange tones, especially in well-conditioned males kept in good water. The pelvic and anal fins are delicate, and the caudal fin is forked. Its small adult size makes it suitable for a reasonably sized community aquarium. Dim lighting, a dark substrate and slightly tinted water can emphasize the contrast between the pale body and black stripe. Colour may change with mood, age, sex and aquarium conditions. A calm environment usually produces better presentation and more confident schooling behaviour.

General diet

In nature, Hyphessobrycon melanostichos likely feeds on small prey and a mixture of animal and plant material taken from the water column and near the surface. In the aquarium, it readily accepts a varied diet of quality micro-pellets, finely crushed flakes and frozen foods such as brine shrimp, daphnia and mosquito larvae. Meals should be small so that everything is eaten quickly and no excess settles on the bottom. One daily feeding or two very small feedings can suit healthy adults. Live or frozen foods help maintain body condition and colour intensity, particularly before breeding attempts. It is better to rotate several foods than to rely on one dry product. Because this tetra has a small mouth, prey should be appropriately sized and offered in the middle or upper part of the aquarium. Remove uneaten food promptly to protect water quality.

Essential data

• River of origin: Rio Aripuanã
• Local name used: Blackline Tetra; Tétra à ligne noire
• Origin of the scientific name: Hyphessobrycon is a genus name of Greek origin; melanostichos refers to the black stripe on the side.
• Full-name etymology: Hyphessobrycon: a generic name formed from Greek roots associated with the idea of smaller or lesser and Brycon, a characid genus; melanostichos: melas, black, and stichos, line or row.
• Common/vernacular names: Blackline Tetra; Tétra à ligne noire
• Family: Characidae
• Subfamily: Not indicated
• Name pronunciation: if ess oh BRY kon mel an oh STY kos
• Discovery: Fernando R. Carvalho and Vinicius A. Bertaco, 2006
• Maximum adult size: About 4 cm
• Water temperature and pH: 23 to 28 °C; pH 5.5 to 7.0
• Stream appearance and surrounding vegetation: Shaded forest streams with roots, branches, leaf litter and dense streamside vegetation.
• Typical tank mates: Peaceful small tetras and calm bottom-dwelling fish, including Hyphessobrycon amandae and Hyphessobrycon bentosi.
• Temperament and behaviour: Peaceful, schooling and mainly active in midwater; keep in a group.
• Water depth: Shallow to intermediate sections of small tributaries.
• Sexual dimorphism: Mature females are generally rounder; males may be slimmer and more colourful.
• Bottom structure and flow: Sand or organic debris with wood and leaves; low to moderate flow.
• Availability status: Wild-collected species; exclusive at Ton.Fish in Canada.

For greater success

To succeed with Hyphessobrycon melanostichos, use a mature, covered aquarium with plants, driftwood and shaded areas. Keep a group of at least eight to ten fish, stable temperature and soft, slightly acidic water. A varied diet, small meals and regular water changes support colour and longevity. Avoid aggressive or much larger tank mates, as well as excessively strong currents. Because this is a relatively uncommon, wild-collected species, gradual acclimation and quarantine are especially sensible. A dark background, subdued lighting and calm companions will usually encourage natural schooling and help the black stripe stand out.