Treasure Cove Case Inlet, Puget Sound View on Ocean MapTide-tumbled, then finished on the beaches of Case Inlet, near Treasure Island. Avg. rating 5 Love5Rate & Review!Species: PacificCultivation: Semi-tumbledSalinity: ModerateSize: SmallRegion: Puget Sound Treasure Cove (1 Rating) KimberlyG on February 9, 2017 at 12:00 pm Rating 5 A fat mouthful of perfect brine followed by an intensely sweet finish. The perfect oyster! Submit a Rating Cancel replySign up now to post your rating, or login here.