Spanner barb, t-barb (Barbodes lateristriga) care guide

Group
Freshwater fish
Other names
T-barb, Spanner barb, Barbodes lateristriga, Puntius lateristriga
Family
Cyprinidae (carps and minnows; subfamily Smiliogastrinae)
Origin
Southern Thailand, Peninsular Malaysia, Sumatra, Java, Borneo and small South China Sea islands; clear rocky forest streams, often in pools below waterfalls.
Water
freshwater
Maximum size
15 cm
Temperature
20–28°C
pH
6–8
Hardness
Soft to moderately hard, 1–10 dGH
Minimum tank
202 litres
Care level
intermediate
Temperament
semi_aggressive

Care

The spanner barb is a large, active barb that needs a big tank. Keep a group of at least five or six; adult males in particular become more solitary as they grow and can turn belligerent if space is short. A tank with a base of at least 150 × 45 cm is a sensible minimum (around 202 litres at 30 cm deep; Seriously Fish suggests a deeper tank of about 300 litres). In the wild it lives in clear, well-oxygenated forest streams over rocks, gravel and boulders, often in the pools at the foot of waterfalls; adults keep to larger, deeper channels and juveniles to shallow side streams. Recreate this with a sand or gravel base, rounded rocks, driftwood and a good current, leaving open swimming space. Hardy plants such as Anubias, Java fern or Bolbitis attached to the decor will survive the activity better than delicate rooted plants. Keep a tight lid. It is adaptable: about 20–28 °C, pH 6–8 and soft to moderately hard water (1–10 dGH) suit it, though some wild populations live in acidic peat-swamp water. Clean, oxygen-rich water with regular partial changes matters more than exact figures. The name comes from the dark markings on its sides, a vertical bar and a horizontal stripe that together look like a spanner or a letter T, on a yellowish-bronze body. Females grow slightly larger and are heavier-bodied; males are more intensely coloured, may develop a heavier head profile, and show small white tubercles on the head when spawning. Colour pattern varies a lot with locality: six regional forms have been recognised from Peninsular Malaysia alone, and northern fish have reduced dark markings. DNA studies suggest the species may be a complex of several closely related fish. It has been placed in Barbus, Puntius, Systomus and Barbodes; FishBase and Wikipedia now use Striuntius lateristriga, though Seriously Fish still lists it as Barbodes lateristriga and it is often sold as Puntius. The species is listed as Least Concern by the IUCN. Sources: Seriously Fish (seriouslyfish.com/species/barbodes-lateristriga/); FishBase (fishbase.se/summary/Barbodes-lateristriga.html); Wikipedia (en.wikipedia.org/wiki/Spannerbarb). Checked October 2026.

Diet

An omnivore that picks at algae, diatoms and detritus and eats insects, worms and small crustaceans in the wild. Offer good-quality flakes and granules alongside regular small live or frozen foods such as bloodworm, Daphnia and Artemia for the best condition and colour.

Breeding

An egg-scattering free spawner with no parental care, and adults will eat the eggs. Well-conditioned fish often spawn in a mature aquarium and some fry may survive among dense plants, but for more young move a conditioned group or pair to a separate tank with fine-leaved plants, spawning mops or a mesh above the base so the eggs fall out of reach. Remove the adults after spawning. Eggs hatch in about 24–36 hours and the fry swim freely after 3–4 days. Start them on infusoria-sized foods, then move on to microworm and newly hatched brine shrimp.

Compatibility and tank mates

Boisterous and big enough to bully or outcompete small, slow or shy fish, so not suited to a typical community tank. Good companions are other robust, active fish of similar size from fast streams, such as larger Danio and Devario species, Barilius and sturdy loaches. Avoid long-finned or timid species.

Last updated 5 October 2026. Community-edited care guide on Aquatic-Auctions.

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