The redeye tetra is a species from the São Francisco, upper Paraná, Paraguay and Uruguay river basins in eastern and central South America. This freshwater fish is commonly kept in aquariums
| Scientific name | Common Name | Size | Temperament |
| Moenkhausia sanctaefilomenae | Red Eye Tetra | 70mm | Peaceful |
| Water Temperature | Water pH | Tank size | Diet |
| 24-27oC | 6.8-7.8 | 100 Liter | Omnivore |