Wash and clean fish thouroughly, leaving it whole. Debone fish, working from body cavity. Rub cavity with basil and pepper. Cover fish and refrigerate several hours. Fry pork sausage, addig green pepper, celery, onion, mushrooms and garlic during final stage of frying. Drain excess fat and stir in cooked wild rice. Season with celery salt and pepper to taste. Stuff fish and bake at 425 degrees F for 15 to 20 minutes, just until fish is done and flakes easily with fork.