Mermaid’s Grotto

Mermaid’s Grotto is a shallow coastal dive site near Onna in Okinawa, offering sheltered conditions and easy access from shore or boats. The site features rocky ledges and small swim-throughs with generally calm currents, making it suitable for beginners and snorkelers progressing to open-water diving. Expect clear visibility common to the Okinawan waters, and a mix of reef life such as damselfish, clownfish, wrasse, and occasional parrotfish around the rock formations and patches of coral. The surrounding area includes accessible shore entries and proximity to popular dive bases in Onna and Kin, with divers often combining this site with other nearby reefs for a full day of shallow- to mid-depth dives.