Artificial algae reefs made of highly elastic rubber material can strengthen corals’ foundation by growing over and between gaps in coral reefs, essentially gluing sections of coral together. They also provide a surface for baby corals to settle, and serve as food for marine life. Artificial algae have the potential to save our oceans, that is, if it can be successfully implemented into the ocean. See here how marine biologists are introducing artificial algae into coral reefs.