A sourcebook of what lurks in the sea in the World of Darkness. Material for all five lines is covered, including vampire pirate fleets, the Rokeah weresharks, the Technocracy's undersea habitat Project Deepwater, ghost ships and necropoli, and two new underwater Kiths for Changeling. There is also general information on the Umbra and Shadowlands and various creatures including fomori; spirits; the Rorqual, ceteaceans who are mobile and sentient caerns/nodes; and the Chulorviah, manipulative man-mollusk monsters.