Benten Island

This dive site, Benten Island, is located off the town of Onagawa on Japan's Sanriku coast, an area recovering from a tsunami and designated as a national park. The site is uniquely influenced by the collision of the cold Oyashio and warm Kuroshio currents, creating a dynamic environment. Divers can explore fascinating aquaculture structures like fixed nets, oyster farms, and sea squirt shelves, alongside a distinctive wall of ascidians unique to this northern region. The marine life here is particularly notable for its unique macro subjects. Divers can observe a variety of northern nudibranchs, dandelions, and anchidnails. Dangler fish are a year-round resident, with opportunities to witness their spawning behavior. The rich nutrient-filled waters, a result of the colliding currents, support a diverse array of both cold and warm water species, although specific large marine animals are not highlighted. The site's year-round presence of dangler fish suggests it can be visited anytime for this specific attraction. For macro enthusiasts, Benten Island offers consistent opportunities for unique finds. Given the variable currents, divers should be prepared for changing conditions, and a local guide is recommended to navigate the best spots. Its shallow average depth also makes it suitable for snorkelers and freedivers looking to experience its unique features.