Commercial fishing is of minor importance in Oklahoma. The prolific white bass (sand bass), Oklahoma's state fish, is abundant in most large reservoirs. Smallmouth and spotted bass, bluegill, and channel catfish have won favor with fishermen. Rainbow trout are stocked year round in the Illinois River, and walleye and sauger are stocked in most reservoirs. In 1998, the state issued 637,557 sport fishing licenses.