Japan's Mysterious Underwater Circles Are Lovely

Illustration for article titled Japans Mysterious Underwater Circles Are Lovely
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Behold the ocean's version of crop circles. But this wasn't made by aliens or humans pretending to be aliens. A single, small fish made this circle.

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Last fall, there were the reports of "mysterious" underwater sea circles, discovered 80 feet below sea level off the coast of Japan. Yoji Okata, an underwater photographer with over 50 years of diving experience, first spotted these geometric sea shapes that can measure over six feet in diameter.

Illustration for article titled Japans Mysterious Underwater Circles Are Lovely
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Illustration for article titled Japans Mysterious Underwater Circles Are Lovely
Illustration for article titled Japans Mysterious Underwater Circles Are Lovely

As website Spoon & Tamago reported at the time, nobody had seen anything like them—nor did anyone know that these beautiful shapes were somewhat romantic.

Illustration for article titled Japans Mysterious Underwater Circles Are Lovely
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Illustration for article titled Japans Mysterious Underwater Circles Are Lovely

It turns out that small male pufferfish create the circles by flapping their fins and even "decorate" their designs with small shells. The geometric shape attracts a prospective partner, who uses the circle's ridges to find her way through the dark ocean floor.

The two fish then mate, and the female lays her eggs in the circle's center. As Spoon & Tamago points out, it's believed the decorative shells also provide nutrients for the pufferfish's offspring.

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Previously, Okata and NHK worked on a TV documentary that showed the creation of these circles. Last Friday, however, the Yomiuri Shimbun reported that there was now a proper scientific paper on the marine pufferfish's unique reproduction.

Illustration for article titled Japans Mysterious Underwater Circles Are Lovely
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Illustration for article titled Japans Mysterious Underwater Circles Are Lovely

You can read the paper on Nature.com, which Okata co-authored and which was published last month.

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「ミステリーサークル」…作ったのはフグ [Yomiuri via 2ch]

Photos:Kaikyokan, ダイビング歴50年水中写真家, NHK

To contact the author of this post, write to bashcraftATkotaku.com or find him on Twitter @Brian_Ashcraft.

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Kotaku East is your slice of Asian internet culture, bringing you the latest talking points from Japan, Korea, China and beyond. Tune in every morning from 4am to 8am.

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DISCUSSION

truthtellah
truthtellah

My underwater circles bring all the fish to the yard
And they're like, it's more symmetrical than yours
Damn right, it's more symmetrical than yours
I could teach you but I'd have to charge.

I know you want it
Those concentric circles
What the ladies go crazy for
They lose their gills
The way I decorate
I think it's time

La la la la la
Swim it up
La la la la la
The ladies are coming

My underwater circles bring all the fish to the yard
And they're like, its got more small shells than yours
Damn right, its got more small shells than yours
I could teach you but I'd have to charge.