Evaluation of coral bleaching along the coast of Ranong and NGA in May 2005 project survey by random an using the line. (transect) length 20-60 meters at the university are all from 52 station, for example, by the length of the line (Transect) depends on the length of the coral reefs and the slope of the coral reef. By measuring the bleaching starting from the coast and ends at the horizontal edge slope. Because the coral reefs of Surin islands and torinla. (Surin National Park). A coral reef at depth and slope line (Transect) was established at a depth of three levels (about 15 20,, and 25 meters) parallel along the coast. Evaluation of the bleaching process sampling stations 36 in Surin National Park The percentage of coral bleaching calculated by measuring the proportion of corals and coral reef bleaching inhabited along the line (Transect)