The website “This Is Colossal” has a lovely bit on a fish with artistic tendencies.
Japanese photographer Yoji Ookata “obtained his scuba license at the age of 21 and has since spent the last 50 years exploring and documenting his discoveries off the coast of Japan. 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.’ …
“The team discovered the artist is a small puffer fish only a few inches in length that swims tirelessly through the day and night to create these vast organic sculptures using the gesture of a single fin. …
“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.” Read more.
Never imagine that there is nothing left to discover. After all, “According to the National Oceanic and Atmospheric Administration less than five percent of the world’s oceans have been explored,”
Photo: This Is Colossal.
The male puffer fish makes this nest to attract a female.

