The correct answer is: Abyssopelagic or Hadalpelagic zones, because these zones are deepest marine zones.
There are 5 main marine zones (and a few subzones):
1. Epipelagic zone (200 m) – the sunlight zone where is s most of the life in the ocean.
2. Mesopelagic (1000 m) – the twilight zone many of the organisms who live in this zone have special adaptations
3. Bathypelagic (1-4000 m) – the midnight zone
4. Abyssopelagic (4-6000 m)
5. Hadalpelagic zones (6-11000 m).
