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photic zone

Photic zone is the zone from the surface to the depth where there is no longer enough light for organisms to grow by photosynthesis.

The depth of the photic zone varies, depending on water clarity and the amount of sunlight. Organisms in photic zone live suspended in their liquid medium. With few exceptions, this zone lacks the solid physical structure provided either by the bottom and other geological features or by large organisms like corals and kelps.

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Marine Biology

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