The "coral defenders" are made of plastic called PHA. Similar to a potato starch, it naturally breaks down when exposed, especially to salt water.

The Shedd Aquarium’s newly reopened rotunda now features the "Wonder of Water" exhibit, showcasing live corals, lush plants, and vibrant marine life in two 28,000-gallon ecosystems. The ...

Wild coral makes up some of the most diverse ecosystems in the world, supporting thousands of species in the process, according to the National Oceanic and Atmospheric Association (NOAA).