Ruby barb - Puntius nigrofasciatus

Scientific name: Puntius nigrofasciatus

Common name: Ruby barb

Family: Cyprinidae

Usual size in fish tanks: 5 - 6 cm (1.97 - 2.36 inch)

014

Recommended pH range for the species: 5.5 - 7

Recommended water hardness (dGH): 4 - 12°N (71.43 - 214.29ppm)

0°C 32°F30°C 86°F

Recommended temperature: 20 - 26 °C (68 - 78.8°F)

The way how these fish reproduce: Spawning

Where the species comes from: Sri Lanka

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Middle levels

Food and feeding

Ruby barbs are omnivores and readily accept a variety of commercial aquarium foods such as high-quality flakes and micro pellets. To support their vibrant coloration and overall health, it's beneficial to supplement their diet with live or frozen foods such as bloodworms, daphnia, or brine shrimp at least once or twice a week. Fresh blanched vegetables like zucchini or spinach can also be offered occasionally.

Origin

Puntius nigrofasciatus is native to Sri Lanka, where it inhabits cool, slow-flowing hill streams and river basins rich in vegetation. These environments often feature shaded areas with sandy or rocky substrates, which help mimic their natural habitat in captivity.

Sexing

Sexual dimorphism is noticeable in adult ruby barbs. Males are typically more vibrantly colored with a reddish hue, especially on their body and fins, and they often display a darker overall tone. Females are generally paler with a rounder, fuller body shape, particularly when carrying eggs. The males may also exhibit red highlights on their anal and pelvic fins.

Breeding

Ruby barbs are egg-scattering spawners that do not exhibit parental care. To encourage breeding, set up a separate breeding tank with soft, slightly acidic water and a temperature around 24–26 °C (75–79 °F). Provide fine-leaved plants such as Java moss or use spawning mops to protect the eggs from being eaten. After spawning, which often occurs in the early morning, remove the adult fish immediately. Eggs usually hatch within 24–36 hours, and fry will become free-swimming after another 3–4 days. Feed the fry infusoria or liquid fry food initially, then transition to finely crushed flakes or microworms.

Lifespan

Under proper care and stable conditions, ruby barbs can live up to 5 years in a home aquarium.

Short description

The ruby barb (Puntius nigrofasciatus) is a peaceful, active schooling fish that thrives in groups of six or more. Keeping them in a group not only enhances their natural behavior but also helps reduce stress and encourages vibrant coloration in males. These fish prefer the middle levels of the aquarium and enjoy plenty of open swimming space. A well-maintained tank with gentle filtration, stable water parameters, and subdued lighting will closely resemble their natural environment. The species was formerly known under the synonym Barbus nigrofasciatus.