Hyphessobrycon cyanotaenia lapis

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The Hyphessobrycon cyanotaenia lapis, also known as the Lapis Tetra, is a small Brazilian characid valued for its bluish coloration and delicate appearance. This form remains uncommon in the aquarium trade, making it especially attractive to aquarists interested in collectible fish and less frequently seen South American species. The specimens offered are wild collected and should receive gradual acclimation, stable water conditions, and a varied diet. Like many small tetras, it displays its most natural behavior when kept in a group, in a planted aquarium with shaded areas and gentle to moderate water movement.

General species description

Hyphessobrycon cyanotaenia lapis is a small schooling fish belonging to the diverse group of South American characids. It is appreciated for its modest size, peaceful behavior, and cool-toned reflections, which show best under subdued lighting. In an aquarium, it should be kept in a group of at least eight to ten fish to reduce nervousness and encourage natural movement. It suits a peaceful community aquarium without large or overly boisterous tank mates. Its intermediate rarity in the trade makes it less frequently available than common captive-bred tetras. Wild fish require extra attention during their first weeks, especially regarding acclimation, appetite, and stable water quality.

Geographical origin and biotope

Hyphessobrycon cyanotaenia lapis originates from Brazil, within an Amazonian drainage associated with small forest streams. Its natural environment is generally characterized by soft water, low mineral content, and light filtered through riverside vegetation. Calm margins, sheltered areas, and sections filled with branches or leaf litter provide suitable cover for a small midwater fish. In the aquarium, this atmosphere can be recreated with fine-leaved plants, roots, and shaded areas. Gentle filtration, good oxygenation, and regular water changes are preferable to strong current or highly alkaline water.

Precise locality and local name

The trade name Lapis Tetra is used for Hyphessobrycon cyanotaenia lapis in the aquarium hobby. The designation Lapis directly evokes the mineral-blue appearance associated with this form. In Québec fish stores, the fish may be listed under its full scientific name or under the common English name Lapis Tetra. To avoid confusion with other small blue tetras, it is best to retain the scientific name on purchase records and check the stated origin. Since these are wild-collected fish, traceability and preventive quarantine are good practices before introducing them into an established aquarium.

Appearance and physical characteristics

The body of Hyphessobrycon cyanotaenia lapis is small, slender, and slightly compressed from side to side, with the typical outline of a tetra. Its most distinctive feature is a dominant cyan-blue to mineral-blue coloration, which may vary according to lighting, mood, and general condition. The fins remain delicate and translucent, while the body may show stronger brilliance when the fish are kept in a group. A dark background, floating plants, and moderate lighting enhance the reflections. Mature males are often slimmer and more intensely colored, while females may appear fuller when carrying eggs; these differences are subtle and depend on the maturity of the fish.

General diet

Hyphessobrycon cyanotaenia lapis accepts a varied diet made up of foods suitable for its small mouth. Quality micro-pellets, finely crushed flakes, and frozen foods such as brine shrimp or daphnia are appropriate. For wild specimens, live or frozen foods can help stimulate feeding after transport. It is best to offer small portions once or twice daily, consumed quickly, rather than overfeeding the aquarium. Rotating dry foods with protein-rich frozen foods helps maintain body condition and coloration. All foods should be small enough to be taken easily by a small tetra.

Essential data

• River of origin: Brazil, Amazon basin.
• Local name used: Lapis Tetra; Tetra Lapis.
• Origin of the scientific name: Hyphessobrycon is the genus name; cyanotaenia and lapis identify the form or taxon presented.
• Etymology of the complete name: cyanotaenia approximately means blue band or blue ribbon; lapis means stone in Latin, referring to the mineral-like color.
• Common or vernacular names: Lapis Tetra; Tetra Lapis.
• Family: Characidae.
• Subfamily: Not specified.
• Name pronunciation: if ess oh BRY kon - sigh an oh TEE nee ah LAH piss.
• Discovery: Not specified.
• Maximum adult size: Small tetra; exact size not specified.
• Water temperature and pH: 24 to 28 °C; pH 5.5 to 7.0.
• Appearance of the watercourse and surrounding vegetation: Small forest streams, filtered light, riverside vegetation, roots, and leaf litter.
• Typical tank mates: Small peaceful characids, small corydoras, and other calm Amazonian fish of similar size.
• Temperament and behavior: Peaceful, schooling, and most active in a group; it appreciates shaded areas.
• Water depth: Shallow to intermediate sections of small streams.
• Sexual dimorphism: Females are often rounder; males are generally slimmer and sometimes more colorful.
• Bottom structure and flow: Leaf litter, branches, and fine substrate; low to moderate current.

In your aquarium

To keep Hyphessobrycon cyanotaenia lapis successfully, use a mature, covered, well-planted aquarium with dark substrate, gentle lighting, and wood for shelter. Keep the group large enough and avoid aggressive or much larger tank mates. The priorities are stable, soft, low-mineral water, slow acclimation for wild fish, and fine food offered sparingly. Quarantine is recommended upon arrival, followed by close observation of breathing, coloration, and appetite. These precautions support long-term adaptation and allow the aquarist to appreciate the natural behavior of this uncommon tetra.