Uruguay river sprat (Ramnogaster melanostoma)

General data
- Main name: Uruguay river sprat
- Habitat: Freshwater
Classification
- Genus: Ramnogaster - Ramnogaster
- Family: Clupeidae - Clupeids
- Order: Clupeiformes - Herrings
- Class: Teleostei - Ray-finned fishes
- Superclass: Osteichthyes - Bony fishes