May group of coastal dolphin therefore simple affect from activity onshore. Especially in areas where the development of the transport, industry as Donsak bay. This place is one of the hotspot sites for dolphin population survey in Thailand and promoting eco-tourism in areas. Photo-identification has been used in field studies of cetaceans and proven to be a useful tool in population estimations (Hammond et al. 1990, Aragones et al, 1997). Because marine mammal as Dolphins and Whale can identify specific characteristics from dorsal fin (Hale,s.2006). The results of this study will help to better understand the status of conservation and important as basic knowledge for Indo-pacific humpback dolphin conservation of this area in the future.
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