Losin is a small island with an old light house located around 100 km East of Narathiwat in the warm, clear, remote area where the Gulf of Thailand meets the deeper blue waters of the South China Sea. Big fishes are abundant because of the distance from the shore and undestroyed reef. The marine life here is amazing, if you are lucky, black tip reef shark, guitar fish (at 40 meters depth), mantarays, and even whale shark will join your visit.