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  1. en.wikipedia.org › wiki › Coral_reefCoral reef - Wikipedia

    A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. [1] . Most coral reefs are built from stony corals, whose polyps cluster in groups.

  2. Oct 19, 2023 · 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 —they have been called “the rain forests of the seas.”

  3. Jun 29, 2016 · Coral reefs are the colonies of tiny living creatures that are found in oceans. They are the underwater structures that are formed of coral polyps that are held together by calcium carbonate. Coral reefs are also regarded as the tropical rainforest of the sea and occupy just 0.1% of the ocean’s surface but are home to 25% of marine species.

  4. Dec 14, 2021 · Coral reefs in India are found in a lot of areas including the Gulf of Kutch, Gulf of Mannar, Palk Bay, Andaman & Nicobar and Lakshadweep Islands. The Gulf of Kutch in the northwest has some of the most northerly reefs in the world.

  5. Jun 19, 2024 · 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.

  6. Nov 7, 2017 · What are coral reefs? Coral can be found in tropical ocean waters around the world. But how much do you know about reefs and the tiny animals—polyps—that bui...

  7. Oct 19, 2023 · Coral reefs are among the most complex and fascinating marine ecosystems in the sea, and they include a wide range of symbiotic relationships. Coral reefs are sometimes known as the “rainforests of the sea.” Nearly a quarter of all the fish in the sea rely on healthy coral reefs. Corals provide habitats for fish and other organisms in the ...

  8. Feb 1, 2019 · 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.

  9. Coral reefs cover less than 1 per cent of the seafloor, but they support at least 25 per cent of marine species. Coral reefs are the most vulnerable marine ecosystem to climate change, and up to 90 per cent of corals could be lost by 2050, even if warming is limited to an increase of 1.5°C.

  10. 350 million people travel to coral reefs each year. Coral reefs are at the center of many coastal and island cultures around the world. For example, in the Kumulipo, the Hawaiian creation chant, the coral polyp was the first organism created, and from that all other life forms sprung forth.

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