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  • Coral reef - Wikipedia
    Coral belongs to the class Anthozoa in the animal phylum Cnidaria, which includes sea anemones and jellyfish Unlike sea anemones, corals secrete hard carbonate exoskeletons that support and protect the coral Most reefs grow best in warm, shallow, clear, sunny, and agitated water
  • Coral reef | Description, Geochemistry, Origins, Threats | Britannica
    Coral reef, ridge or hummock formed in shallow ocean areas by algae and the calcareous skeletons of coral polyps and other coelenterates A coral reef may grow into a permanent coral island Often called ‘rainforests of the sea,’ coral reefs are home to a spectacular variety of organisms
  • Coral reef ecosystems - National Oceanic and Atmospheric Administration
    Coral reefs are some of the most diverse ecosystems in the world Coral polyps, the animals primarily responsible for building reefs, can take many forms: large reef building colonies, graceful flowing fans, and even small, solitary organisms
  • Coral Reefs - National Geographic Society
    Coral reefs are important ocean habitats and offer a compelling case of the risks of climate change Reefs provide a large fraction of Earth’s biodiversity and have even been called “the rainforests of the seas ”
  • What is a Coral Reef? - NASA
    Coral reefs cover only 1% of the ocean floor, but support an estimated 25% of all marine life in the ocean, earning them the moniker ‘rainforest of the sea ’
  • Basic Information about Coral Reefs - US EPA
    Coral reefs are among the most biologically diverse and valuable ecosystems on Earth This web site describes the importance of coral reefs, threats to them, and ongoing efforts to protect them
  • Coral reefs - UNEP - UN Environment Programme
    Coral reefs underpin the safety, coastal protection, well-being, food security, and economic security of hundreds of millions of coastal people in least developed countries, economies in transition, and small island developing states around the world
  • About Coral Reefs - The Reef-World Foundation
    Discover how coral reefs work, why they’re vital to marine life and how tiny coral polyps build vast underwater ecosystems Learn about symbiosis, reef biodiversity and the powerful connection between coral reefs, seagrass and mangroves
  • Coral Reefs Ecology Biodiversity - Coral Reef Alliance
    Coral reefs are one of the most fascinating, complex and biologically diverse ecosystems
  • Coral Reefs | U. S. Geological Survey - USGS. gov
    Reefs buffer shorelines from waves, storm surges, and tsunamis and help to protect ~200 million of the world's coastal dwellers from flooding, erosion, property damage, and loss of life Reefs support high levels of biodiversity; they are home to up to 25% of all ocean species





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