(Pongsuwan.1998) has been reported that 80% mortality of Acropora spp. Previous studies have suggested that coral bleaching were caused by high temperature or irradiance. (Fitt.2001) suggested that it is caused by thermal tolerance limits and thermal thresholds in several tropical corals. coral reef along the Andaman coast line faced the problem of an increase in turbidity. In fact, the Andaman sea has faced problems of nutrient loading, red tide, and macroalgal blooms several times after the tsunami in 2004