In 1995, divers discovered a curious structure off Amami Ōshima Island in Japan. There on the seabed they spotted a giant ...
These "underwater crop circles" remained a mystery for more than a decade. In 2011, it was finally discovered a pufferfish—in this case the white-spotted pufferfish (Torquigener albomaculosus ...
Explanations offered included covert underwater military exercises ... in 1995 and remained a mystery for 16 years. As with crop circles on land, alien interference was cited as an explanation.