+A barrier reef is a long, narrow wall of [Coral](/wiki/coral) that grows parallel to a coastline. These submerged structures rise from the [Ocean](/wiki/ocean) floor, sheltering calm lagoon waters from the open sea.
+## See also
+- [Reef](/wiki/reef)
+- [Lagoon](/wiki/lagoon)
+- [Marine Life](/wiki/marine_life)
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