Hyphessobrycon melanostichos (Blue Black Banded Tetra)

07 June 2026

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The Blue Black Banded Tetra (Hyphessobrycon melanostichos), often called the Lapis Tetra, is a striking addition to the aquarium hobby. Originating from Brazil's Rio Tapajós basin, this peaceful schooling fish captivates aquarists with its brilliant iridescent blue body, bold black lateral stripe, and active, engaging schooling behavior.

Hyphessobrycon melanostichos (Blue Black Banded Tetra)

Overview

The Blue Black Banded Tetra (Hyphessobrycon melanostichos) is a relatively recent and highly sought-after introduction to the aquarium hobby. Revered for its breathtaking iridescent blue coloration and bold contrasting markings, this active little fish is a true gem for planted aquariums. They are generally hardy, making them suitable for aquarists who can provide a stable, well-maintained environment.

Image of blue black banded tetra hyphessobrycon melanostichos

Distribution and Habitat

This species is native to South America, specifically found in the Rio Tapajós basin in Mato Grosso, Brazil. They naturally inhabit clear to slightly tannin-stained streams and tributaries with moderate water flow. Their natural environment is characterized by sandy substrates, submerged roots, and a scattering of leaf litter which provides both shelter and foraging opportunities.

Description of Blue Black Banded Tetra

Body shape:

They possess a classic tetra profile that is laterally compressed and slightly deep-bodied, allowing them to navigate swiftly through the water column.

Color:

Their coloration is their most defining feature. The upper half of the body exhibits a brilliant, highly reflective iridescent blue. A thick, solid black lateral stripe runs horizontally from the operculum (gill cover) all the way into the caudal peduncle, contrasting sharply with a silvery-white lower belly.

Barbels:

Like other characins, they do not possess any barbels.

Snout:

They have a relatively short, blunt snout typical of the Hyphessobrycon genus, with a slightly upturned mouth adapted for mid-water feeding.

Eyes:

The eyes are proportionately large and expressive, often featuring a subtle golden or reddish metallic hue in the upper portion of the iris.

Fins:

The dorsal, anal, and pelvic fins are largely translucent, though they may display subtle hints of white, yellow, or pale blue depending on the lighting and the fish's diet.

The Tail:

The caudal (tail) fin is deeply forked and primarily clear, allowing the stark black body stripe to stand out prominently.

Temper

These tetras are known for their peaceful and easy-going temperament. They are not fin-nippers and generally ignore other species, making them excellent community tank residents.

Sociality

They are highly social, obligate schooling fish. To feel secure and display their best colors and natural behaviors, they must be kept in groups of at least 6 to 8 individuals, though a school of 10 or more is highly recommended.

Activity

Blue Black Banded Tetras are very active mid-water swimmers. They spend the majority of their time darting around the aquarium, playfully interacting with conspecifics, and exploring their environment.

Keeping and Caring for Blue Black Banded Tetra

Tank size:

A minimum tank size of 60 liters (15 gallons) is required for a small school, but a larger aquarium of 75 liters (20 gallons) or more is ideal to provide adequate swimming space for their active nature.

Water Parameters:

Temperature

They thrive in warm tropical waters, with ideal temperatures ranging between 24-28°C (75-82°F).

pH

A slightly acidic to neutral pH is preferred, optimally between 6.0 and 7.2.

Hardness

Soft to moderately hard water is best, with a general hardness (dGH) of 2-10.

Ammonia, Nitrite, Nitrate

As with most fish, Ammonia and Nitrite must always remain at 0 ppm. Nitrates should be kept as low as possible, ideally below 20 ppm, through regular water changes.

Lighting

Moderate to dim lighting is preferred. Bright lights can wash out their iridescent colors and make them skittish; floating plants are excellent for diffusing light.

Water flow

They appreciate a moderate water flow that simulates the currents of their native Brazilian streams.

Decorations and Plants

A heavily planted setup with driftwood, smooth rocks, and dried botanicals (such as Indian almond leaves) mimics their natural habitat perfectly. Ensure there is plenty of open swimming space in the center of the tank.

Diet

In the wild, they are micro-predators and omnivores, feeding on tiny invertebrates, zooplankton, and detritus. In the aquarium, they are unfussy and will readily accept a wide variety of foods.

Some Feeding Tips

Provide a high-quality staple diet of micro-pellets or crushed flakes. To bring out their spectacular blue iridescence, frequently supplement their meals with live or frozen foods such as Daphnia, baby brine shrimp, and bloodworms.

Breeding

Breeding the Blue Black Banded Tetra is typical of egg-scattering characins. They offer no parental care and will eat their own eggs if given the chance. To breed them, set up a dedicated, dimly lit spawning tank with very soft, slightly acidic water and fine-leaved plants or a spawning mop. Condition the adults with high-protein live foods, introduce them to the breeding tank, and remove them immediately after spawning is observed. The fry will hatch in a few days and require infusoria until they are large enough to eat baby brine shrimp.

Conclusion

The Blue Black Banded Tetra is an absolutely stunning species that brings an eye-catching splash of iridescent blue and deep black to any freshwater aquarium. With their peaceful demeanor, active schooling behavior, and relatively straightforward care requirements, they make a fantastic choice for both intermediate and experienced aquarists looking to elevate their community setups.

Fish info

Care level: Easy - Moderate
Temperament: Peaceful
Adult size: 3.5 - 4 cm
Life expectancy: 3-5 years
Fish type: Tetra
Temperature : 24-28°C
pH: 6.0-7.2
Color Form: Black, Blue, Silver

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