Local villagers reported the discovery to fisheries officials and the Sireetarn Marine Endangered Animals Rescue Centre, based at the Department of Marine and Coastal Resources (DMCR) centre at Cape Panwa, at 8:40pm.
Officials identified the dugong as a two-metre-long male, weighing approximately 110kg. The animal had been dead for at least 24 hours.
A cause of death has yet to be determined.
The carcass found last night follows a dugong found dead in the water off Baan Kho En, Mai Khao, on Oct 18, and another found dead in the water off Kamala beach last Wednesday (Oct 23).
The DMCR has confirmed eight dugongs have died and been washed ashore this month.
Marine ecosystem expert Thon Thamrongnawasawat estimated that only a few dozen dugongs will remain in the Andaman Sea in five to eight years, reports the Bangkok Post.