Mix 1/4th cup olive oil, 4 teaspoons old bay seasoning, 2 teaspoons lime juice, and 2 teaspoons lemon juice well. Pour the mixture over raw tuna fish steak and let it marinate for 20 minutes, turning occasionally. Place the tuna fish steak on a hot grill and sear for 1-2 minutes each side. Finish cooking away from the hot area for 8-10 minutes. Enjoy the treat!