Preheat oven to 350° F. Lightly grease a medium baking dish.

In a shake, medium bowl, mix cayenne pepper, lemon pepper, garlic powder, salt, and pepper.

Brush both sides of catfish fillets with butter. Rub fillets with the cayenne pepper mixture on both sides.

Heat a heavy large skillet over medium-high heat until really hot. Add fillets, and fry approximately 2 minutes on each side, until slightly blackened.

Arrange blackened fillets in a single layer in the prepared baking dish, and coat with Italian-style salad dressing. Bake 30-35 minutes in the preheated oven, until fish is easily flaked with a fork.