Littoral Zone

Littoral refers to the coast of an ocean or sea, or to the banks of a river, lake or estuary. It is usually used as an adjective, but may also be used as a noun. The littoral zone is defined as the area between the high water and low water marks. The word is derived from the Latin noun litus, litoris, meaning "shore". (The doubled 't' is a late mediaeval innovation and the word is sometimes seen in the more classical-looking spelling 'litoral'.)
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Noun
1. the region of the shore of a lake or sea or ocean
(synonym) littoral, litoral, sands
(hypernym) seashore, coast, seacoast, sea-coast

1. That portion of a body of fresh water extending from the shoreline lakeward to the limit of occupancy of rooted plants. 2. A strip of land along the shoreline between the high and low water levels.