Fish that look like cotton candy

Photo: Yoshikazu Tsuno/AFP/Getty Images

Fancy fish meet fine art

Bulbous-headed kingyo ("goldfish" in Japanese) swim in a tank as part of the "Art Aquarium" exhibit at the Nihonbashi Mitsui Hall in Tokyo.

Designed by aquarist Hidetomo Kimura, the aquatic installation showcases thousands of colorful fish swimming in dozens of colorful and odd-shaped tanks.

The wildly successful exhibit, which attracted more than 200,000 visitors last year, runs from July 13 to Sept. 23.

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Visitors watch fish inside an art aquarium

Photo: Yoshikazu Tsuno/AFP/Getty Images

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Aquarium art exhibit

Photo: Yoshikazu Tsuno/AFP/Getty Images

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Goldfish with bulging eyes

Photo: Yoshikazu Tsuno/AFP/Getty Images

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Catie Leary is a photo editor at Mother Nature Network. Follow her on Twitter and Google+.