Rinse the fish under cold water and pat dry with paper towels.
Make a few diagonal cuts on each side of the fish to help with even cooking.
In a shallow dish, combine the all-purpose flour, cornmeal, paprika, ground coriander, garlic powder, onion powder, dried thyme, salt, black pepper, and cayenne pepper (if using).
Dredge each fish in the flour mixture, ensuring it is evenly coated on all sides.
In a large skillet or frying pan, heat about 1/2 inch of vegetable oil over medium heat.
Once the oil is hot, carefully add the fish to the skillet. Fry the fish for about 4-5 minutes per side, or until golden brown and cooked through. The internal temperature should reach 145°F (63°C).
Remove the fish from the skillet and place them on a paper towel-lined plate to drain any excess oil.
Garnish with chopped fresh parsley and serve with lemon wedges.
Enjoy your meal!