Hasemania nana

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A small characid native to Brazil, Hasemania nana is known in the aquarium trade as the Silver Tip Tetra. Its understated body becomes striking when the light catches its silver-tipped fins and yellow-and-black markings. Peaceful, active, and schooling, it does best in a group in a well-planted aquarium with soft to slightly acidic water. Its small size and calm nature make it a useful choice for a peaceful community aquarium of modest dimensions. The species is fairly common in the specialty trade, but it still benefits from stable water conditions and careful maintenance. A dark substrate and subdued lighting help emphasize its metallic coloration.

General species description

Hasemania nana is a small schooling fish in the family Characidae, associated with the São Francisco basin in Brazil. It mainly inhabits calm or moderately flowing sections of small streams, where it moves in groups among marginal vegetation. In an aquarium, it should be kept with several conspecifics to encourage natural behavior and reduce nervousness. A group of at least eight individuals displays its movements and social interactions more effectively. Despite its small size, it remains active and generally uses the middle level of the aquarium. Its peaceful temperament allows it to live with other small, calm fishes. Efficient filtration without excessive current, together with clean water, is essential for its long-term well-being.

Geographical origin and biotope

Reference country: Brazil. Hasemania nana is associated with the rio São Francisco basin, especially in Minas Gerais and the rio das Velhas system. Its habitat includes shallow streams and small tributaries with clear or slightly tinted water, bordered by vegetation. The bottom is generally made up of sand, fine gravel, and plant debris, with roots and branches providing shelter. Current speed ranges from low to moderate, with quieter areas along the margins. In an aquarium, dense planting along the sides and back, a few roots, and an open swimming area reproduce this structure well. Dim lighting is also useful for bringing out the fish’s metallic reflections and reducing excessive exposure.

Precise location and local name

The known range lies in the São Francisco basin of Brazil, particularly in Minas Gerais and the rio das Velhas network. In the aquarium trade, the English name Silver Tip Tetra is the most widely used; the phrase “silver-tipped tetra” is also used as a translation. A traditional Brazilian vernacular name is not commonly used in international aquarium commerce. Populations from different tributaries may show slight differences in color intensity, but they retain the same general profile: a small silver body, contrasting fins, and schooling behavior. For aquarists, identification should rely primarily on morphology and the stated origin rather than on the commercial name alone.

Appearance and physical characteristics

The body of Hasemania nana is short, laterally compressed, and colored silver to golden. The fin tips, especially on the dorsal, anal, and caudal fins, display yellow and black markings that explain its common name. The caudal fin is forked, and the body can appear relatively translucent in juveniles. Adult males are generally slimmer and more strongly colored, while females have a fuller abdomen. Adult size remains small, at about 3 cm. Like many small characids, it shows its best coloration when kept in a group, in stable water, and over a dark substrate. Lighting, diet, and general condition can all influence the intensity of its metallic sheen.

General feeding

In nature, Hasemania nana feeds on small particles, tiny invertebrates, and organisms associated with vegetation or the water surface. In the aquarium, it readily accepts a varied diet of small dry foods, fine granules, and appropriately sized frozen or live foods. Brine shrimp, daphnia, and cyclops can be offered as supplements without becoming the only food. Small portions should be given once or twice daily, limiting waste while allowing every fish to feed. Oversized foods or items that sink too quickly are less suitable. A varied diet supports coloration, growth, and overall condition. Feeding should also be adjusted to the size of the group and the aquarium’s filtration capacity.

Essential data

• Name of original river: rio São Francisco; rio das Velhas for the reference region
• Local name used: Silver Tip Tetra; silver-tipped tetra as an aquarium translation
• Origin of the scientific name: Hasemania honors John D. Haseman; nana means small or dwarf
• Etymology of the full name: Hasemania is a generic name honoring Haseman; nana means small, referring to the species’ small size
• Common/vernacular names: Silver Tip Tetra; silver-tipped tetra
• Family: Characidae
• Subfamily: Stethaprioninae
• Name pronunciation: ha-seh-MA-nee-ah - NA-na
• Discovery: Christian Frederik Lütken, 1875
• Maximum adult size: approximately 3 cm
• Water temperature and pH: 22 to 28 °C; pH 5.5 to 7.5
• Stream appearance and surrounding vegetation: shallow streams, marginal vegetation, roots, branches, and plant debris
• Typical tankmates: small peaceful characids and other small fishes from the São Francisco basin
• Temperament and behavior: peaceful, active, and schooling; mainly swims in open water
• Water depth: shallow marginal areas and small tributaries
• Sexual dimorphism: males are slimmer and often more colorful; females have a rounder abdomen
• Bottom and current: sand, fine gravel, and plant matter; low to moderate flow

In your aquarium

To keep Hasemania nana successfully, provide a group of at least eight individuals, stable water, and gentle filtration. A planted layout, dark substrate, and shaded areas encourage natural behavior and strengthen the fish’s colors. Avoid large or boisterous tankmates that could stress it or view it as prey. Small varied meals, good water quality, and regular water changes complete the basic requirements. Its small size does not mean it belongs in an overcrowded nano aquarium: swimming space and environmental stability remain more important than simply choosing a small tank.