• Formed from tiny marine organisms called coral polyps
• Coral polyps live in colonies
• They extract from sea water, calcium and use it to build protective shells
• When they die their skeletons pile together and are commented together by calcareous algae to form a ridge like rock parallel to the shore called coral reef.
• Coral reefs include fringing reefs barrier reefs and a toll.
Kavungya answered the question on June 8, 2019 at 06:16
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