Skip to content
Fish Freshwater Care: medium Peaceful

Java Barb

Barbonymus gonionotus
— No votes yet Rate it
Other names: Silver barb, Barbonymus gonionotus, Puntius gonionotus, Barbodes gonionotus
Group: Barbs and cyprinids · Family: Cyprinidae · Origin: Southeast Asia — from the Mekong and Chao Phraya basins to the Malay Peninsula, Sumatra and Java

A food fish widely farmed in Southeast Asia; in the aquarium trade it is sold as juveniles in silver, gold and albino forms. It is a plant-eating schooling fish that reaches 35–40 cm.

Will it suit my tank?

Last updated October 16, 2026

Temperature
22–28°C
pH
6.5–8
Hardness
5–15 dGH
Adult size
35 cm
Minimum tank size
1000 liters
Social structure
School
Group
at least 5, ideally 6+
Swimming zone
Middle
Diet
Omnivore
Breeding
Egg scatterer

Water parameters

Temperature22–28°C
pH6.5–8
General hardness (GH)5–15 dGH
Recommended range
May escape, needs a lid Eats small fish Eats shrimp Damages plants

Overview

October 16, 2026 · Suggest an edit

The Java barb is an important food fish widely farmed in ponds and rice paddies in Southeast Asia. Juveniles of its silver, gold and albino forms are sold in the aquarium trade; but adults reach 35–40 cm. Like the tinfoil barb it has a deep, laterally compressed body, but its fins are gray-yellowish rather than red. It has been introduced to many countries for aquaculture; aquarium fish must never be released into the wild.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 1000 liters and 200 cm in length for 5–6 adults; in the long run a large indoor pond is more suitable.
  • 24–27°C; powerful filtration, high oxygen levels, a 30–50% weekly water change.
  • Simple decor: roots and large rocks; plants are eaten in a short time.
  • It jumps powerfully; a heavy, tight-fitting lid is essential.

Diet

October 16, 2026 · Suggest an edit

An omnivore that feeds mostly on plant matter. Use spirulina pellets, blanched vegetables, lettuce and spinach as the staple; supplement with granules and frozen foods. It also eats small fish and shrimp that fit in its mouth.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

A peaceful but very fast and large schooling fish. It does not attack fish of similar size; it sees small species as prey and stresses shy species.

Good companions: peaceful giant fish of similar size: tinfoil barbs, bala sharks, large plecos, large gouramis.

Avoid: small and medium community fish, dwarf shrimp, planted tanks.

A short profile for this species

The Java 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

0 notes

Things you won't find in books, learned by trial and error. The most helpful ones are on top.

No notes yet. If you have experience with this species, leave the first note.
Change history and contributors
  1. Page created · October 16, 2026