The tropical waters around Thailand are particularly calm and clear and provide an ideal habitat for more than 200 species of coral and a myriad of other fascinating marine life. Thailand's exceptional marine bio-diversity is the result of two distinct marine ecosystems -- the Gulf of Thailand to the east with the islands of Koh Samui, Koh Tao and Mu Koh Ang Thong, the largest marine national park, being the crown jewels of the region.

To the west, hundreds of idyllic islands are dotted around the Andaman Sea which forms part of the Indian Ocean. Of this tropical islands of the Andaman, Phuket and Phi Phi being the best known, while the Similan and Surin islands have been rated as world-class diving sites.