The black neon tetra is native to the Paraguay basin of southern Brazil. In the wild, these fish prefer small tributaries, creeks, areas of flooded forest, and sandbanks. Their natural habitat is usually very acidic, and the water is stained brown from the tannins released by decaying organic material.
| Scientific name | Common Name | Size | Temperament |
| Water Temperature | Water pH | Tank size | Diet |
| oC |