The black ruby barb is a peaceful, beautiful small barb from the forested streams of Sri Lanka, off the southern coast of India. Best described as a friendly omnivorous tank mate, it may have issues with being out-competed by larger, more carnivorous fish. In the wild, both deforestation and over-collection have put this species at risk.
| Scientific name | Common Name | Size | Temperament |
| Pethia nigrofasciata | Ruby barb | 7.5mm | Peaceful |
| Water Temperature | Water pH | Tank size | Diet |
| 23-26oC | 6.0-7.0 | 75 litres | Omnivore |