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Lagoon refer to both the lagoons in atolls, formed by the growth of coral reefs and coastal lagoons formed by the build-up of sandbanks.

They are shallow coastal bodies of water separated from the ocean by a series of barrier islands which lie parallel to the shoreline. Inlets, either natural or man-made, cut through barrier islands and permit tidal currents to transport water into and out of the lagoons.


  • What is a lagoon?