The tunnel of the large tank at Aquamarine Fukushima, which holds about 2,050 tons of seawater, is a specialty of the aquarium. The passageway is designed in a triangular shape, resembling the "tide line" of the Kuroshio and Oyashio currents. On the Kuroshio side, fish such as bonito and sardines swim at a tremendous speed, sparkling and shining as they swim around. On the other hand, the Oyashio side is rich in plankton, with seaweed growing densely, allowing you to feel the "sea that nurtures life." Inside the tunnel, try comparing the fish of the Oyashio and Kuroshio currents.
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