- Is also known as the Hadal zone, which was derived from "Hades" which means unseen.

                                                          - Ranges from 19, 686 ft to 32, 810 ft in depth

                                                          - This area is called the trenches because ocean trenches are the only place that can reach this depth.

                                                          - Only creatures like starfish, seaworms ans sea cucumbers can survive in this level.

                                                          - Not much is known about this level because it is impossible to explore because of the intense pressure.