Golden Dwarf Barb (Pethia gelius) Breeding Guide

Breeding Pethia gelius: sexing gravid females, conditioning, a dimly lit egg-trap spawning tank, and rearing tiny fry that free-swim after a 24-36 hour hatch.

Overview

Pethia gelius is a small barb native to the Ganges and Brahmaputra drainages in northern India, Nepal and Bangladesh, reaching about 35-40 mm standard length. It is an egg-scattering free spawner with no parental care that, in good condition, will spawn often.

Sexing

Mature females are noticeably rounder-bellied, often a little larger, and less intensely coloured than males. Conditioned, gravid females are the easiest to identify.

Conditioning

Adults can be conditioned together in good condition and will spawn often; a varied diet with live and frozen foods brings females into roe.

Breeding Setup

Use a dimly lit breeding tank with mature water. Cover the base with a mesh of a grade large enough that eggs can fall through but small enough that adults cannot reach them; fine-leaved plants such as Taxiphyllum or spawning mops work well. Add an air-powered sponge filter or air stones for oxygenation, with slightly acidic to neutral pH and temperature toward the upper end of the range.

Spawning Behavior & Trigger

Well-conditioned fish scatter eggs over the medium, which fall through out of reach. The species spawns readily when warm and well fed.

Egg & Fry Care

The adults will probably eat the eggs given the chance and should be removed as soon as any are noticed. Eggs hatch in 24-36 hours, with fry free-swimming after 3-4 days. Provide infusoria-grade food for the first few days until they are large enough to accept microworm, Artemia nauplii, or similar.

Common Challenges

Because the fry are tiny, an extended supply of infusoria-grade food is essential before they reach Artemia size. An egg-trap base and prompt removal of adults prevent egg loss.