Graus nigra

General data
- Main name: Graus nigra
- Habitat: Saltwater
Classification
- Genus: Graus - Graus
- Family: Girellidae - Nibblers
- Order: Centrarchiformes - Basses and sunfishes
- Class: Teleostei - Ray-finned fishes
- Superclass: Osteichthyes - Bony fishes