Tatsukushi Bay
Tatsukushi Bay has many asymmetrical inlets; these were formed because the geological strata, which are up to 17 million years old, are vulnerable to weathering and erosion. The bay is known for its great variety of marine life, a result of the Kuroshio Current constantly bringing in warm water from the south. Tatsukushi Bay is home to more than 100 species of coral, a level of diversity that is rare for such a small body of water in the temperate climate zone. The bay also hosts many types of sea slugs and other colorful creatures. Taking a tour on a glass-bottom boat from Tatsukushi to Minokoshi Beach on Cape Chihiro is a great way to observe both the fish and the bay’s leaflike shikorosango coral (Pavona decussata) up close.