= Aphotic zone
{wiki=Aphotic_zone}
The aphotic zone is a layer of water in an ocean or any other body of water that lacks sufficient sunlight for photosynthesis to occur. It is typically found below the photic zone, where sunlight is able to penetrate and support the growth of photosynthetic organisms like phytoplankton. The aphotic zone extends to depths where light levels drop off significantly, generally starting around 200 meters (656 feet) in the ocean and can extend to greater depths in certain areas.
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