Eigenmannia nigra

General data
- Main name: Eigenmannia nigra
- Habitat: Freshwater
Classification
- Genus: Eigenmannia - Eigenmannia
- Family: Sternopygidae - Glass knifefishes
- Order: Gymnotiformes - South American knifefish
- Class: Teleostei - Ray-finned fishes
- Superclass: Osteichthyes - Bony fishes