Relating to or characterized by the presence of light, especially in aquatic environments. The photic zone is the upper layer of water where sufficient light penetrates for photosynthesis.
From Greek 'phos' or 'photos' meaning 'light.' The term entered scientific usage in the early 20th century as biologists studied the relationship between light availability and aquatic life distribution.
The photic zone is life's solar panel in aquatic ecosystems - typically extending only 200 meters down in the ocean, this thin slice of illuminated water produces virtually all marine oxygen and forms the foundation of oceanic food webs through photosynthetic plankton!
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