Mix flour, cornmeal, eggs, salt, pepper and garlic powder in mixing bowl. Add enough beer, mixing thoroughly, to get the consistency of a thick pancake mix. Pour batter over shrimp or fish and let marinate for an hour or two and deep fry at 370 degrees. Consistent hot grease will float the shrimp or fish in a very short time. Drop shrimp or fish into hot grease, one at a time, to prevent them from sticking together.