The secret of Japan’s underwater crop cycle turns out to be the mating signal of this small fish. world News
Shapes that seem out of place have long dotted the sea floor off southern Japan. Divers near Amami Oshima Island began noticing large circular patterns carved into the sand in the 1990s, which were precise enough to appear artificial. Every year, they would appear and then vanish, leaving behind nothing but curiosities. No clear explanation…