1a. Dorsal and anal fins of adults pinkish-orange; black band in anal fin of breeding males usually absent; usually no row of large tubercles along inner edge of nostril; gill rakers 20 to 28; pectoral rays 17 to 19.
largescale stoneroller
Campostoma oligolepis

1b. Dorsal and anal fins of adults bluish-gold to black; black band in anal fin of breeding males; 1 to 3 large tubercles along inner edge of nares; gill rakers 11 to 17; pectoral rays 15 to 17.
bluefin stoneroller
Campostoma pauciradi