An ordinary silver-gold barb for most of the year, until a male comes into condition and turns deep wine red with a black head and fins. Few freshwater fish change this completely.
Temperament
Common health issues
- Ich (white spot)
- Fin rot
- Swim bladder disorder
Care at a glance
- ExerciseModerate
An active swimmer that appreciates open swimming space.
- GroomingRoutine tank care
Weekly partial water changes keep them in top shape.
- Living spaceNano-tank friendly
Happy in a small, stable, well-filtered tank.
- Owner experienceSome experience helps
A little know-how makes life smoother.
- Commitment4โ6 years
Plan for a long, loving relationship.
Health to watch: Ich (white spot) ยท Fin rot ยท Swim bladder disorder
๐ Care guide
The Black Ruby Barb (Pethia nigrofasciata) is endemic to Sri Lanka and reaches about 5 to 6 cm. Out of condition it is a modest gold fish with three dark bars. A displaying male transforms: the front half of the body flushes deep ruby red and the head and fins darken to near black, a change that appears within minutes and fades just as fast when the display ends. A group of eight or more needs 100 litres or more at 22-27C, pH 6.0 to 7.5 in soft to moderately hard water, with planting, wood and shaded light. Feed flake, micro pellets and frozen daphnia, bloodworm and brine shrimp, plus vegetable content. It is one of the most peaceful barbs, far gentler than a tiger barb and unlikely to nip when kept in a proper group, which makes it a good community fish with tetras, rasboras and corydoras. Colour is strongest in a dimly lit, planted tank with a dark substrate and several competing males, and washes out completely in a bright bare tank.
Frequently asked questions
How active is a Black Ruby Barb?
Moderate. An active swimmer that appreciates open swimming space.
How much maintenance does a Black Ruby Barb need?
Routine tank care. Weekly partial water changes keep them in top shape.
What tank size does a Black Ruby Barb need?
Nano-tank friendly. Happy in a small, stable, well-filtered tank.
Is a Black Ruby Barb a good fit for first-time owners?
Some experience helps. A little know-how makes life smoother.
How long do Black Ruby Barb live?
4โ6 years. Plan for a long, loving relationship.
What health issues affect the Black Ruby Barb?
Keep an eye out for Ich (white spot), Fin rot, Swim bladder disorder. These are worth raising with your vet, along with any screening they recommend.
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