+A reef is a natural underwater barrier, often formed by the accumulation of [Coral](/wiki/coral) polyps and other [Marine Life](/wiki/marine_life). These vibrant structures create critical habitats, supporting a vast array of species and protecting coastlines from erosion.
+## See also
+- [Biodiversity](/wiki/biodiversity)
+- [Ecosystem](/wiki/ecosystem)
+- [Ocean](/wiki/ocean)
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