Abstract
A long-term survey on monitoring coral reef status using the Manta-tow technique has been carried out over approximately two decades in Thailand. This paper presents results of the survey from three off-shore areas (north, central and south) in the Andaman Sea (since 1988) and from the two near-shore areas and one off-shore area in the Gulf of Thailand (GoT, since 1995). The results revealed variations in the change of live coral cover over time between different locations. Natural and direct/indirect man-made disturbances have influenced these changes. Until early 2010, reefs in the Andaman Se