Abyssal Halls

The Abyssal Halls is the main hallway in the Throne of the Tides. It leads from the entrance to the "elevator" known as the Riptide. Right before the elevator is two more corridors, they remained blocked by Ozumat until he is shocked by the defense system.
Once Ozumat has been removed the corridors lead to the Coral Garden to the west and the Deep Blue Observatory to the east.