Why coral reefs are destroyed. There are both natural causes and human activities such as catching fish in the coral reef errors. Use of chemical substances used bored blast e-mail, as well as holding other clams and clam. Keeping corals or store to be sold to tourists. To drop anchor boats damaged coral reefs To dig a water trail The reclamation or construction filed ... right on the beach. Mining or open land to build roads. Including disposal of waste into the sea making sea water, degraded. Best natural causes such as severe storms than usual, such as storm gay. Once a year,RS 2532 (1989) make the reef where the storm blows through corrupt, such as Koh Tao. There are also being destroyed by drilling of other organisms, such as Chinatown, clam shells, some kinds of phriang River, Porcupine. Parrot fish Barbed wire star fish Etc.