The coastline of the Surin Islands is very indented with wide sandy bays protected by rocky headlands. Due to the islands’ distance from the mainland and the presence of adjacent deep waters and strong ocean currents, the waters of the Surin Islands are very clear, fostering healthy coral growth. Marine life is bountiful with numerous types of coral and fish species present on the reef. Occasional visitors include whales and whale sharks. Three species of sea turtle use the islands’ beaches as nesting sites.