Inside the museum, you can see bluefin tuna swimming in groups in a 2,200-ton donut-shaped tank, and penguins swimming around in the largest penguin exhibition hall in Japan.

"Penguin Ecology" is one of the largest penguin exhibition facilities in Japan where Humboldt Penguins, Southern Rockhopper Penguins, Fairy Penguins, and King Penguins are bred.

From the Ogasawara Islands to the Seven Islands of Izu, and from the outer part of Tokyo Bay to the tidal flats in the inner part of Tokyo Bay, the various marine environments of Tokyo are on display.