The oceanic zone is MOSTLY APHOTIC.
Step-by-step explanation:
The aphotic zone is that part of the ocean where there is no or minimum sunlight. This Region receives a sunlight of less than one percent. The only light present in this region is bio-luminescence. The aphotic zone located under the euphotic zone.
This aphotic zone stretches 1000m downwards. This regions, there is absence of phytoplankton or algae. Only carnivorous animals and other organism that feeds on a sediments are present in this layer. Also energy required for this region is taken from the euphotic region.