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  2. Coral reef - Wikipedia

    en.wikipedia.org/wiki/Coral_reef

    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. Coral belongs to the class Anthozoa in the animal phylum Cnidaria, which includes sea anemones and ...

  3. Coral - Wikipedia

    en.wikipedia.org/wiki/Coral

    [43] [44] Synchronous spawning is very typical on the coral reef, and often, all corals spawn on the same night even when multiple species are present. [45] Synchronous spawning may form hybrids and is perhaps involved in coral speciation. [46] A male great star coral, Montastraea cavernosa, releasing sperm into the water.

  4. The Structure and Distribution of Coral Reefs - Wikipedia

    en.wikipedia.org/wiki/The_Structure_and...

    Canton Island typifies the isolated coral atolls dotting the Pacific Ocean. The Structure and Distribution of Coral Reefs, Being the first part of the geology of the voyage of the Beagle, under the command of Capt. Fitzroy, R.N. during the years 1832 to 1836, was published in 1842 as Charles Darwin's first monograph, and set out his theory of the formation of coral reefs and atolls.

  5. Coral spawning season brings hope for the Great Barrier Reef

    www.aol.com/coral-spawning-season-brings-hope...

    For a few days every southern hemisphere spring, the world’s biggest and most famous coral reef explodes. This is the coral spawning season – a time when the Great Barrier Reef creates the ...

  6. List of reefs - Wikipedia

    en.wikipedia.org/wiki/List_of_reefs

    The Amazon Reef (also referred to as the Amazonian Reef) is an extensive coral and sponge reef system, located off the coast of French Guiana and northern Brazil. It is one of the largest reef systems in the world known to exist, with scientists estimating its length to be over 600 miles (970 km) long, and covering over 3,600 square miles ...

  7. The world's coral reefs are bleaching. What does that mean? - AOL

    www.aol.com/news/worlds-coral-reefs-bleaching...

    A quarter of marine life will depend on reefs for shelter, finding food or spawning at some point in their lives and coastal fisheries would struggle without corals. Every year, reefs provide ...

  8. Marine ecosystem - Wikipedia

    en.wikipedia.org/wiki/Marine_ecosystem

    Coral reefs are one of the most well-known marine ecosystems in the world, with the largest being the Great Barrier Reef. These reefs are composed of large coral colonies of a variety of species living together. The corals form multiple symbiotic relationships with the organisms around them. [7]

  9. Great Barrier Reef - Wikipedia

    en.wikipedia.org/wiki/Great_Barrier_Reef

    The Great Barrier Reef is the world's largest coral reef system, [1] [2] composed of over 2,900 individual reefs [3] and 900 islands stretching for over 2,300 kilometres (1,400 mi) over an area of approximately 344,400 square kilometres (133,000 sq mi).