Bonneville cisco (Prosopium gemmifer)

General data
- Main name: Bonneville cisco
- Climates: Continental, Mountain
- Habitat: Freshwater
- Native: North America
Classification
- Genus: Prosopium - North American whitefishes
- Family: Salmonidae - Salmons and Trouts
- Order: Salmoniformes - Salmons and Trouts
- Class: Teleostei - Ray-finned fishes
- Superclass: Osteichthyes - Bony fishes
Description
The Bonneville cisco (Prosopium gemmifer) is a species of whitefish from the family Salmonidae endemic to Bear Lake along the Utah-Idaho border, United States. Max length : 22.0 cm TL Common length : 17 cm TL max. reported age: 6 years Occurs in open water. Widely scattered when water is colder than 15 °C; as the water warms, descends into deeper, colder water. It is one of three species of whitefishes endemic to Bear Lake, the others being the Bear Lake whitefish and the Bonneville whitefish.