The document provides information on three coral species: Porites, Symphyllia, and Heliopora. It describes their hierarchical classification, physical characteristics, ranges, threats, and conservation status. Porites is the largest coral colony that can grow up to 8 meters tall. Symphyllia forms dome-shaped brain coral colonies with distinctive valleys. Heliopora secretes a blue skeleton and forms large columnar structures. All three species face threats from climate change, pollution, and the aquarium trade and are listed on CITES to regulate international trade.