Okinawa researchers discover ‘plasticorals’ pollution

Researchers in Okinawa, Japan, have identified a new form of marine pollution termed ‘plasticorals’. This phenomenon involves melted polymers from common household plastics becoming permanently fused with coral skeletons.

Discovered during routine beach waste research, the hybrid waste—a type of plastiglomerate—was identified through spectroscopic and microscopic analysis. The melted plastics penetrated the pores of dead coral skeletons, creating an inseparable bond. The findings, published in the journal Marine Pollution Bulletin by scientists from the Okinawa Institute of Science and Technology and the University of Ryukyu, highlight a persistent way plastic waste integrates into sensitive marine ecosystems.

This pollution poses risks to reef functionality. Coral gravel on beaches often returns to the sea, where it serves as a substrate for young corals and provides shelter for small fish and marine organisms. The presence of plasticorals may disrupt these natural processes. Further research is required to determine the exact origins of these materials and their potential toxic effects on reef organisms.