Okinawa researchers identify ‘Plasticorals’ pollution

Researchers in Okinawa have identified a new form of pollution termed ‘Plasticorals,’ where common household plastic polymers have fused with natural coral skeletons. The study, published in the journal Marine Pollution Bulletin on September 4, 2026, was conducted by a team from the Okinawa Institute of Science and Technology (OIST) and the University of Ryukyu.

Using microscopic and spectroscopic techniques, scientists confirmed that melted plastics had penetrated the fine pores of dead coral, making the two materials inseparable. These findings were documented on beaches in northern Okinawa, including areas within the protected Yanbaru National Park.

One theory suggests that high temperatures from beach bonfires may melt plastic waste, allowing it to seep into porous coral remains. While the exact origin of all examined pieces remains unclear, the discovery highlights the profound impact of human activity on natural marine structures.