In small mixing bowl, combine mustard, water, juice, Worcestershire sauce and c ayenne. Place coating mix in shallow dish. Dip fish first in mustard mixture and then dredge in coating mix to coat. In 10-inch skillet, heat 1/2 inch oil over medium heat. Add fish. Fry three to four minutes or until golden brown. Turn once. Drain on plate linew with a paper towel.