Much like the crop circles that show up on land, a beautiful 'mystery circle' with enchanting geometric shapes has begun showing up under water in Japan.

As related on the YouTube video, the circles were discovered by a SCUBA diver:

Recently while on a dive near Amami Oshima at the southern tip of the country, Ookata spotted something he had never encountered before: rippling geometric sand patterns nearly six feet in diameter almost 80 feet below sea level. He soon returned with colleagues and a television crew from the nature program NHK to document the origins what he dubbed the "mystery circle."

Amazingly, the artist is a single fish who is making the complex designs with a fin.

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