The islands’ name, Similan, means the number 9 in the Malaysian dialect (Yawi). In 1982 Similan Islands were announced by the Thai government as a national nature reserve. Later on 2 additional islands were added to the first group of 9 islands of the nature reserve – the island Bon and the island Tachai (about which you can read another article – click here for the article about Tachai island).
Ko Tachai is well known for its quality reef and abundance of fish. It is especially known for the many kinds of big fish, such as the leopard shark, nurse shark, mantra rays, sea turtles, etc. During the months of April and May, it is also possible to watch whale sharks on Ko Tachai – so that scuba diving is a wonderful experience one should not miss.