This dive site, Koh Rangka Chio (เกาะรังกาจิว), is a vital protection unit within Mu Ko Chumphon National Park, Unit No. 1. It serves as a crucial conservation area and a turtle hatching station, with dedicated caretakers residing on the island. Visitors are required to pay an entrance fee of 40 baht for Thais (elderly free) and 200 baht for foreigners, contributing to the park's maintenance and conservation efforts.
The underwater environment is characterized by extensive seagrass beds, which provide essential foraging grounds and habitat for various marine species. The site is a known spawning ground for sea turtles, making it an excellent location to encounter these majestic creatures. Other marine life includes butterfly fish and a variety of small reef fish typical of shallow, protected Thai waters.
The best time to visit generally aligns with the typical dry season in Southern Thailand, from February to May, though turtles can be present year-round. Divers and snorkelers should prioritize responsible interaction with marine life, particularly the turtles and their nesting areas, adhering to national park guidelines. This site is particularly suitable for beginners due to its shallow depths and likely calm conditions, offering a gentle introduction to the rich marine biodiversity of the Gulf of Thailand.

