Dwarf Barb

Pethia phutunio

Photo of aquarium fish Dwarf Barb
Natural range
  • West Bengal area
  • Bangladesh area
CyprinidsConservation status: Least concern LC

Family:Cyprinids (Cyprinidae)

Other scientific names: Barbus phutunio, Cyprinus phutunio, Puntius phutunio, Systomus leptosomus, Systomus phutunio

The Phutunio Barb, also known as the Dwarf Barb (scientific name Pethia phutunio), belongs to the carp family (Cyprinidae). This miniature fish is easy to keep and breed, making it an excellent choice for beginner aquarists. It also coexists successfully with other species of similar size.

Required aquarium volume
50 L
Size in aquarium
2.5 – 3.9 cm
Temperature
21 – 26 °C
Temperament
Peaceful (regular)
Parameters
Temperature21 – 26 °C
Water pHSlightly acidic (6) – Neutral (7)
Water dHVery soft (3) – Hard (12)
Water salinityno salt (freshwater)
Size in aquarium2.5 – 3.9 cm
Lifespan4 years
TemperamentPeaceful (regular)
Toward small fishnot a predator
Required aquarium volume50 L
Lightingany
Substrateany, but dark
Water flowweak
FeedingSmall / appropriate size / pieces
CareGroup (8–10 individuals)

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Dwarf Barb get?

An adult reaches 2.5–3.9 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Dwarf Barb need?

The minimum recommended volume is 50 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Dwarf Barb need?

Temperature 21–26 °C, pH 6–7, hardness 3–12 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Dwarf Barb live?

Around 4 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Dwarf Barb aggressive?

Temperament: peaceful (regular). Keep this in mind when choosing tank mates.

How many Dwarf Barb should be kept together?

Recommended setup: group (8–10 individuals). Ignoring this is a common cause of stress and disease.

What does Dwarf Barb eat?

Diet type: small / appropriate size / pieces. Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Dwarf Barb?

The scientific name of the species is Pethia phutunio, family Cyprinids (Cyprinidae). It also appears in the literature as: Barbus phutunio, Cyprinus phutunio, Puntius phutunio.

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