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Fish Freshwater Care: easy Peaceful

Golden Dwarf Barb

Pethia gelius
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Other names: Gelius barb, Pethia gelius, Puntius gelius, Barbus gelius
Group: Barbs and cyprinids · Family: Cyprinidae · Origin: South Asia — northeastern India and Bangladesh (Ganges–Brahmaputra basin)

A dwarf barb that reaches only 3–4 cm, with a copper-gold body decorated with irregular black blotches. Peaceful and not a fin-nipper; suitable for nano and shrimp tanks.

Will it suit my tank?

Last updated October 16, 2026

Temperature
18–25°C
pH
6–7.5
Hardness
4–12 dGH
Adult size
3.5 cm
Minimum tank size
40 liters
Lifespan
3–5 years
Social structure
School
Group
at least 8, ideally 12+
Swimming zone
Middle
Diet
Omnivore
Breeding
Egg scatterer

Water parameters

Temperature18–25°C
pH6–7.5
General hardness (GH)4–12 dGH
Recommended range
Considered shrimp safe Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The golden dwarf barb is one of the smallest known barbs; adults reach only 3–4 cm. Its semi-transparent, copper-gold body bears a few irregular black blotches, most prominently below the dorsal fin and on the caudal peduncle. In the breeding season males gain an orange-copper sheen in the middle of the body. With its calm nature and small size, it leaves a very different impression from its larger barb relatives.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 40 liters and 45–60 cm in length for a school of 8–12.
  • Comfortable at 20–24°C; being of subtropical origin, it does not want constantly high temperatures.
  • Dense planting, floating plants and dim light; gentle flow is enough.
  • A 20–25% weekly water change; it should go into a mature tank.

Diet

October 16, 2026 · Suggest an edit

Omnivorous, but its mouth is small. Use crushed flakes and micro granules as the staple; vary the diet with small live and frozen foods such as baby brine shrimp (Artemia nauplii), daphnia and cyclops.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Peaceful and somewhat shy; it grows bolder in a large school and a planted setting. It leaves adult dwarf shrimp alone.

Good companions: Boraras and small rasboras, celestial pearl danios (galaxy rasboras), small tetras, otocinclus, pygmy corydoras, dwarf shrimp.

Avoid: active, dominant barbs, large fish and any species that could fit it in its mouth.

A short profile for this species

The Golden Dwarf Barb page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026