Thaw fish, if frozen. Rinse fish; pat dry with paper towels. Place fish in a resealable plastic bag set in a shallow dish. For marinade, in a small bowl combine parsley, chicken broth, lemon peel, lemon juice, rosemary, oil, shallot, tarragon, salt, and garlic. Pour marinade over fish; seal bag. Marinate at room temperature for 30 minutes, turning bag occasionally.