is a marine national park in Amphoe Palian and Amphoe La-ngu in Satun. The area was proclaimed a national park on 31 December 1994 and comprises islands such as Ko Phetra, Ko Khao Yai, Ko Lanti, Ko Lidi, Ko Bulon, Ko Laoliang, and Ko Praoma. Access can be from Pak Bara Pier in Satun. The most suitable time for a visit is during December-April. There is tourist accommodation near park hedquarters. For more information, please contact the Marine National Park at tel. 561 2920-21 to the Mu Koh Phetra National Park Division at Tambon Pak Nam, Amphoe Langu, Satun, tel. (074) 781582.