The Atlantean Sect are a group of vampires that live underwater. Recently, they find that there is no safety even below the sea as humans fish, explore and drill for oil. They may be ancient Atlanteans turned into vampires millennia ago. At some point, they agreed to a truce, the Shallow Peace, between themselves and the Atlanteans. The Aqueos are led by a Highlord.
The Atlanteans Sect attended the vampire gathering that takes place once in a century. They helped Xarus assassinate his father, Dracula.