Pour 1/4 cup of the Asian Seafood Sauce over fish and pineapple in shallow dish; turn to coat well.
Refrigerate 20 minutes or longer for extra flavor. Remove fish and pineapple from sauce. Discard any remaining sauce.
Grill fish over medium-high heat 6 to 7 minutes per side or until fish flakes easily with a fork. Brush with remaining 1/4 cup sauce halfway through cooking. Grill pineapple 2 minutes or until heated through. Serve with fish.