Thailand was once a dugong is a wide gulf of Thailand and Andaman Sea. It has decreased due to hunting . Getting caught in fishing gear And destruction of seagrass Found that dugongs are still scattered along the coast of Thailand and the Andaman Sea and the Gulf of Thailand Gulf of Thailand , but there are fewer still find some of Rayong, Chumphon , Surat Thani , Nakhon Si Thammarat , Songkhla , but found that the largest group Chao Mai National Park . And field Hunting Ngai island.