Design & Geometry by Puffer Fish

Japanese Puffer Fish

These "mystery circles" are about 7 feet wide and are made by a 5 inch fish.
It takes about seven to nine days for the pufferfish to construct the circles.

Males laboriously flap their fins as they swim along the seafloor, resulting in disrupted sediment and amazing circular patterns. Although the fish are only about 12 centimeters (5 inches) long, the formations they make measure about 2 meters (7 feet) in diameter.

But this new pufferfish's geometric patterns have three features never seen before. First, they involve radially aligned ridges and valleys outside the nest site. Second, the male decorates these ridges with fragments of shells. Third, the male gathers fine sediments to give the resulting formation a distinctive look and coloring.

Strangely enough, the male "gathers" the fine sediments using the circular pattern itself, Kawase said. A fluid dynamics test using a half-size model of one of these circles found that the upstream portion of the circle funnels water and fine sediments toward the center. Then, the downstream peaks and valleys funnel the water outward. The speed of water was slowed by nearly 25 percent in the center, where the eggs are laid, the study noted.

It takes about seven to nine days for the pufferfish to construct the circles. 





Design by Puffer Fish

https://youtu.be/HRyqIq0taug

Credits: Live Science

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