The study was conducted in May 2005, February 2007 and October 2009 (Fig. 2), which is difficult to measure the growth of coral reefs in the study. The use of permanent steel grating Except for the Surin Islands. So Staghorn 58 samples in the Surin Islands and the neighboring islands, sampling 10 samples to measure the length. The growth rate of Acropora spp not damaged by the tsunami of 2004, some of the reefs were brought back to the laboratory. To identify the type and rating system for coral follow Veron.