Golden barb (Pethia gelius) care guide

Group

Freshwater fish

Other names

Golden barb, Dwarf barb, Puntius gelius, Barbus gelius

Family

Cyprinidae (carps and minnows; subfamily Smiliogastrinae)

Origin

Ganges and Brahmaputra basins of northern India, Nepal and Bangladesh; sluggish, often murky river margins, slow streams and rice fields over mud or silt.

Water

freshwater

Maximum size

4 cm

Temperature

18–24°C

pH

6–7

Hardness

Soft to moderately hard, 1–10 dGH

Minimum tank

54 litres

Care level

intermediate

Temperament

peaceful

Care

The golden dwarf barb is a tiny, very peaceful but timid schooling fish. Keep a group of eight to ten or more; in a larger group it is bolder and shows better colour. A tank with a base of at least 60 × 30 cm (around 54 litres) is a sensible minimum. It does best in a well-planted tank with a soft, dark substrate, driftwood, leaf litter and some floating plants to dim the light, with gentle flow. In the wild it lives in slow, often turbid water over mud or silt at the edges of rivers, in streams through farmland and in rice fields, where depth and flow change with the seasons. It is a subtropical fish that prefers cooler water: about 18–24 °C, pH 6–7 and soft to moderately hard water (1–10 dGH). It is a small golden-yellow fish with dark blotches on the body, usually three, and a broad black band around the base of the tail. Females are rounder-bellied, slightly larger and less colourful than males. In 2013 two fish previously treated as forms of this species were separated: Pethia canius was revalidated and Pethia aurea described as new. The three are very similar, so fish sold as P. gelius may sometimes be one of the others. It was moved from Puntius to Pethia in 2012 but is often still sold as Puntius gelius. The species is listed as Least Concern by the IUCN. Sources: Seriously Fish (seriouslyfish.com/species/pethia-gelius/); FishBase (fishbase.se/summary/Pethia-gelius.html); Wikipedia (en.wikipedia.org/wiki/Pethiagelius). Checked October 2026.

Diet

A micropredator that eats small insects, worms and zooplankton in the wild. It takes dried food but should have small live or frozen foods such as Daphnia and Artemia every day. Imported fish often arrive thin, so feed them up in a quiet tank without competition first.

Breeding

An egg-scattering free spawner with no parental care; well-conditioned fish spawn often, and the adults will eat the eggs. FishBase notes it spawns in shallow water. Use a separate, dimly lit tank with a mesh base, fine-leaved plants such as Java moss, or spawning mops, and add a conditioned pair or small group; remove the adults after spawning. Eggs hatch in 24–36 hours and the fry are free-swimming after 3–4 days. Feed infusoria-sized foods first, then microworm and newly hatched brine shrimp.

Compatibility and tank mates

Best kept on its own or with other very small, peaceful fish that like similar cooler water, such as Microdevario, Trigonostigma (harlequin-type rasboras) and small Danio species. Safe with dwarf shrimps such as Caridina and Neocaridina. Avoid boisterous, large or fast-feeding fish that would outcompete or frighten it.

Last updated 5 October 2026. Community-edited care guide on Aquatic-Auctions.