Dwarf Barb

One of the smallest members of the genus Pethia, Pethia gelius is native to slow-flowing, vegetated streams and floodplain ponds across the Gangetic plain and Bangladesh. Barely reaching 4 cm, it is a nano barb well suited to smaller aquariums. The body is pale yellowish-silver with scattered dark spots of variable size and intensity, and there is a pleasing golden iridescence to the scales when the fish is well-fed and in good condition.

In the aquarium, Pethia gelius thrives in soft, warm to room-temperature water with gentle filtration and dense planting. It is entirely peaceful — even timid — and should be kept in groups of eight or more to provide confidence. Companions must be carefully chosen: larger, boisterous fish will easily outcompete it for food or stress it.

Feeding requires attention to food size: micro-pellets, crushed flake, daphnia, and micro-worms are all ideal. The Dwarf Barb is an engaging, active little fish that more than compensates for its modest size with constant movement and an endearing social dynamic.

Water: 16–24°C, pH 6.0–7.0, soft to slightly moderate hardness (GH 2–10); cooler water tolerated. Tank: 40 L minimum; heavily planted, gentle filtration; no large or boisterous tankmates. Feeding: Omnivore; micro-pellets, crushed flake, daphnia, micro-worms, baby brine shrimp. Breeding: Egg-scatterer over fine plants; fry are tiny; requires infusoria or green water as first food. Compatibility: Peaceful nano species only; best with small rasboras, nano tetras, and small livebearers.