1) Dark 2) Lacking light 3) Lightless 1) Dark 
lightless
• (a.) Without light.
A·pho'tic (ȧ*fō'tĭk) adjective [ Greek 
[adj] - lacking light
aphotic 1. A description of those parts of the ocean that are not reached by sunlight, or plants that grow there without photosynthesizing. 2. A reference to any environement or habitat that has no sunlight of biological significant intensity. 3. Literally, no light.
adjective lacking light; especially not reached by sunlight; `the aphotic depths of the sea where no photosynthesis occurs`
lightless; dark.