The Railroad Valley springfish, Crenichthys nevadae, is a rare goodeid fish of the Great Basin of western United States, occurring naturally in just seven thermal springs of Railroad Valley in Nye County, Nevada.

This springfish is omnivorous, with animal food representing 2/3 or more of its consumption during the summer, primarily consisting of gastropods.

The Railroad Valley springfish is federally listed as a species threatened with extinction.

[2][3] Its extremely limited range makes it vulnerable to competition from introduced species, and to habitat modifications.

The springfish has been introduced to Chimney Springs and Hot Creek Canyon in Nye County, Nevada.