Pour buttermilk into a bowl.
In a separate bowl, mix flour, salt, and garlic powder. Dip each fish portion into buttermilk then roll in flour until evenly covered, set aside on plate.
Heat deep-fat fryer to 360 degrees F and cook fish for 6-8 minutes, or until golden brown and done. To check for doneness, cut into one portion and check to see if fish is flaky and looks milky white. Serve with french fries, coleslaw, and garlic bread.