Stream Willatuk: The Legend of Seattle's Sea Serpent Online Free – Watch Full Movie from Home at 123Movies. . Seattle filmmaker Oliver Tuthill Jr. directs this deadpan mockumentary that imparts the legend of Willatuk, a fictitious sea serpent that American Indians first spotted swimming in the waters off Puget Sound in 1736. Narrator Graham Greene explores the history of the mysterious creature that's considered sacred by a Pacific Northwest Indian tribe, which vows to protect it from the competing interests of local hunters.