aphotic


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aphotic

/aphot·ic/ (a-fot´ik) without light; totally dark.

aphotic

characterized by, or growing in, the absence of light.
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Moderately exposed hard bottoms in aphotic zone with no particular species dominance
By spanning this range of tectonic settings, the observatory network also spans major zones of the ocean, including a range of photic to aphotic environments, and photosynthetic- to chemosynthetic-energy-based ecosystems (Barnes et al.