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Mysterious Underwater Crop Circles Created by Puffer Fish

Using underwater cameras, researchers in Japan found that small puffer fish swim through the day and night to create these vast organic sculptures, that look like crop circles, using the movement of a single fin. The team found the circles serve a variety of crucial ecological functions, the most important of which is to attract mates. Apparently the female fish are attracted to the hills and valleys within the sand and traverse them carefully to discover the male fish where the pair eventually lay eggs at the circle’s center, the grooves later acting as a natural buffer to ocean currents that protect the delicate offspring. Scientists also learned that the more ridges contained within the sculpture resulted in a much greater likelihood of the fish pairing. This video shows a puffer fish in the process of making one of the beautiful designs.

sources 1, 2

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