This dive site, Mini-Grotto on Shimoji Island, Okinawa, offers a captivating cave diving experience where divers navigate an underwater tunnel to surface in a serene, hidden pond. It's renowned for its dramatic natural light illuminating the cavern and features an adventurous return route passing "Bent's Mark". The unique geological formation of an underwater passage leading to a hidden air-filled grotto is its primary attraction.
The Mini-Grotto boasts a diverse marine ecosystem. Among the schooling fish, horse mackerel and snappers are commonly observed. The sandy bottom hosts fascinating dwellers such as sea eels and seahorses, while keen-eyed divers can spot mimic species like razor fish and armadillo fish, blending seamlessly with their environment.
The site's suitability for all levels, combined with natural light, makes it enjoyable year-round, though Okinawa's warmer months (typically May to October) offer the most comfortable conditions. Its shallow maximum depth and ability to surface within the pond make it exceptionally well-suited for both freedivers and snorkelers seeking a unique underwater and overwater experience.
