Scientists from the Australian Institute of Marine Biology have developed an ultra-fine biodegradable film. The sun shield is made from an ultra-thin biodegradable film that is 50,000 times thinner than a human hair and contains calcium carbonate, the same ingredient corals use to make their hard skeletons. Designed to sit on the surface of the water above the corals, rather than directly on the corals, to provide an effective barrier against the sun, according to the Foundation that has been working in collaboration with the University of Melbourne and the Australian Institute of Marine Science.

Scientists conducted the trials on seven different coral types and concluded that this protective layer decreased the bleaching of most species, cutting off sunlight by up to 30 percent. The test results of this floating sun shield, made of calcium carbonate, were remarkable enough to establish the certainty in protecting the reef from the effects of bleaching. However, scientists considered it unreasonable to cover the entire 348000 square-kilometer reef with the sun shield, rather, it could be deployed on a smaller level to protect high-risk areas.