Mu Ko Surin principle attraction is the fact that it is an unspoiled tropical paradise far from the mainland, with healthy forested islands surrounded by clean water supporting a profusion of coral reef species. The coral reefs are the best, most diverse coral reefs accessible to snorkelers. The coral reefs at Ko Surin do not require the use of scuba equipment to observe them. Being the primary snorkelling spot on Thailand, Mu Ko Surin attracts a lot of tourists each year, many also arrive on pleasure cruises and on some days the number of visitors can be excessive. The islands also attract great research interest, and many scientists visit the islands each year for a variety of reasons ranging from coral reef surveys to bird observation.