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Caption: Colonial “hard corals” form elaborate finger-shaped, branching, or mound-shaped structures and can create masses of limestone that stretch for tens or even hundreds of miles. Many coral reefs fringing coasts consist of nearshore inner reef flats that slope to deeper water fore reefs farther offshore. The reef crest, between the inner reef flat and outer fore reef, lies in extremely shallow water and may be exposed during the lowest tides. Waves commonly crash against or break on the reef crest. Fringing reefs help to protect harbors, beaches, and shorelines from erosion and wave damage by storms.
'''Source:''' http://pubs.usgs.gov/fs/2002/fs025-02/ '''Caption:''' Colonial “hard corals” form elaborate finger-shaped, branching, or mound-shaped structures and can create masses of limestone that stretch for tens or even hundreds of miles. Many co
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