Thaw fish, if frozen. Rinse fish steaks; pat dry with paper towels. Cut into four serving size pieces, if necessary. For marinade, in a shallow dish combine lime juice, oregano, oil, lemon-pepper seasoning, and garlic. Add fish; turn to coat with marinade. Cover and marinate in refrigerator for 30 minutes to 1-1/2 hours, turning steaks occasionally. Drain fish, reserving marinade.
Place fish on the greased unheated rack of a broiler pan. Broil 4 inches from the heat for 8 to 12 minutes or until fish begins to flake when tested with a fork, turning once and brushing with reserved marinade halfway through cooking. Discard any remaining marinade. Before serving, squeeze the juice from one lime wedge over each steak.