Coral reefs are complex, bio-engineered structures formed primarily by the skeletons of calcifying organisms, most notably hard corals. These tropical ecosystems provide essential habitats for a vast amount of marine biodiversity, supporting diverse fish, invertebrates, and other life forms. The construction relies on the symbiotic relationship between the coral polyps and specific types of algae, which provide the coral with nutrients necessary for metabolic processes and skeleton growth. Structurally, reefs function as wave dampeners, protecting coastlines from high-energy ocean forces, while also acting as crucial nurseries and feeding grounds for commercial and wild marine life.