Longfin form
Barbodes semifasciolatus var.
Origin: Southeast Asia: the Malay Peninsula, Sumatra, and Borneo. Inhabits lowland rivers and streams with slow current, rich vegetation, and slightly acidic water chemistry.
Also known as: Gold-finned barb, Sachsi barb, Puntius sachsii
Fact sheet
- Size
- 7 cm
- Lifespan
- 5 years
- Minimum tank size
- 80 L
- Temperature
- 18–25 °C
- pH
- 6–7.5
- Hardness GH
- 5–15 °dH
- Temperament
- Peaceful
- Social behavior
- Schooling
- Swimming zone
- Middle
- Diet
- Omnivore
- Jumps out
- Yes
- Eats plants
- No
Overview
An aquarium strain with elongated paired and caudal fins, bred by specialist hobbyists. More ornamental but slightly less agile than the standard form.
Appearance
Shared with the species: Gold Barb
The body is compact and moderately elongated, uniformly golden-yellow to bright yellow. A characteristic diagnostic feature is a rounded black spot at the base of the dorsal fin, with a secondary spot on the caudal peduncle. Fins are yellowish to orange; males are more vividly coloured with intensified belly hues during spawning. Females are noticeably deeper-bodied and larger.
Care
Shared with the species: Gold Barb
A tank of 60–80 L is sufficient for a group of six to eight. Temperature 22–26°C, pH 6.0–7.5, hardness 5–15 dGH. The species appreciates densely planted areas with open swimming zones. Moderate filtration and weekly water changes of 25–30% are required. A fine sandy or small-gravel substrate approximates natural conditions. A lid is advisable although the species rarely jumps.
Feeding
Shared with the species: Gold Barb
An omnivore accepting dry flakes, granules, and live or frozen foods such as bloodworm, daphnia, artemia, and tubifex. Vegetable components — blanched spinach, algae, spirulina — help maintain the vivid golden colouration. Feed in moderation twice daily; overfeeding leads to obesity and water quality decline.
Compatibility
Shared with the species: Gold Barb
A peaceful schooling species that coexists well with most similarly sized fish. Suitable companions include tetras, danios, other small barbs, corydoras catfish, and small characins. Solitary individuals become timid; a group is essential for natural behaviour and colouration.
Breeding
Shared with the species: Gold Barb
An egg-scattering free spawner with no parental care. Condition breeders separately and feed live foods generously before spawning. Use a 40–50 L spawning tank with fine-leaved plants or a mesh screen. A female may produce 100–300 eggs; remove adults immediately. Eggs hatch in 24–48 hours, with fry free-swimming on days three to five, initially eating infusoria then baby brine shrimp. Growth is rapid.
Fun facts
Shared with the species: Gold Barb
Pethia sachsii is frequently confused with the Schuberti form of the green barb, but it is a biologically distinct species with a different natural range and ecology. The male's golden colouration reaches peak intensity during the spawning season under optimal water conditions. This small barb has been bred for aquaria in Southeast Asia for generations, though it remains less commonly exported to Europe than the competing Schuberti strain.