This dive site, Ko Rok Yai, is one of two idyllic islands in the Andaman Sea, protected as part of a National Park. It's celebrated as a top snorkeling destination from Ko Lanta. Underwater exploration primarily involves navigating the vibrant reef system that stretches along its southeast coast, offering a straightforward experience in incredibly clear waters. There is no specific historical background or complex navigation required beyond following the reef.
The marine ecosystem at Ko Rok Yai teems with life, especially a myriad of colorful reef fish swimming among extensive coral formations. While large pelagic species are uncommon in these shallow waters, divers and snorkelers can expect to encounter diverse smaller reef inhabitants, including various species of damselfish, parrotfish, clownfish, and an array of hard and soft corals.
The optimal period to visit Ko Rok Yai is during Thailand's dry season, typically from November to April, when the sea is calm, and visibility is exceptional. This period guarantees the 'translucent sea' experience mentioned. Due to its shallow maximum depth of 4 meters, this site is perfectly suited for snorkelers, beginner divers, and freedivers seeking easy access to a thriving, shallow coral environment.
