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Saltwater coral refers to marine invertebrates that belong to the class Anthozoa and are typically found in warm, tropical oceans. These organisms form colonies of polyps that secrete calcium carbonate to create a hard exoskeleton, which provides support and protection. Saltwater coral comes in a variety of shapes, sizes, and colors, and plays a crucial role in marine ecosystems by providing habitat for a diverse range of marine life. These organisms rely on photosynthetic algae called zooxanthellae for energy, and are sensitive to changes in water temperature and quality. Saltwater coral is often prized for its beauty and is commonly used in aquariums and for decorative purposes.