Combine first 5 ingredients in a large shallow dish. Sprinkle fish with 1/4 teaspoon salt; dredge in cornmeal mixture, coating evenly.
Pour oil to a depth of 1 1/2 inches into a deep cast-iron skillet; heat to 350°. Fry fish, in batches, 5 to 6 minutes or until golden; drain on paper towels.
Prep: 15 min., Cook: 6 min. per batch