Wednesday 11 September 2013

Hard Coral, Nha Trang - Hon Mun Island, Vietnam


Hard corals are the reef builders. The hard coral polyp, such as those in Brain Coral, secrete a limestone skeleton cup around itself and live inside it for protection. When a polyp dies, its skeleton house remains intact.  The name "hard coral" derives from the skeleton which forms around the polyp.



 

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