Meaning of euphotic zone

eu•pho'tic zone"

Pronunciation: (y-fō'tik), [key]
— Oceanog. Oceanog.
  1. the layer of sea water that receives enough sunlight for photosynthesis to occur: it varies greatly with season and latitude, from 0 to 1200 ft. (0–360 m).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.