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  2. Scleractinia - Wikipedia

    en.wikipedia.org/wiki/Scleractinia

    Scleractinia, also called stony corals or hard corals, are marine animals in the phylum Cnidaria that build themselves a hard skeleton. The individual animals are known as polyps and have a cylindrical body crowned by an oral disc in which a mouth is fringed with tentacles. Although some species are solitary, most are colonial.

  3. Pillar coral - Wikipedia

    en.wikipedia.org/wiki/Pillar_coral

    Pillar coral (Dendrogyra cylindrus) is a hard coral (order Scleractinia) found in the western Atlantic Ocean and the Caribbean Sea. It is the only species in the monotypic genus Dendrogyra. It is a digitate coral -that is, it resembles fingers (Latin digites) or a cluster of cigars, growing up from the sea floor without any secondary branching ...

  4. 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 ...

  5. Coral - Wikipedia

    en.wikipedia.org/wiki/Coral

    Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton. A coral "group" is a colony of very many genetically identical polyps. Each polyp is a sac-like animal typically only a few millimeters in diameter and a few centimeters in height.

  6. Anthozoa - Wikipedia

    en.wikipedia.org/wiki/Anthozoa

    Stony corals or hard corals: Fungia fungites Tubastraea coccinea: Solitary or colonial corals in a vast assortment of sizes and shapes, the stony skeleton being composed of aragonite. Septa develop in multiples of six. [9] Zooxanthellate or azooxanthellate. [2] Shallow and deep water habitats worldwide, the greatest diversity being in tropical ...

  7. Elkhorn coral - Wikipedia

    en.wikipedia.org/wiki/Elkhorn_coral

    Elkhorn coral can also use filter feeding techniques to obtain food. At night, Elkhorn coral use their tentacles to snatch free-swimming zooplankton from the water. Zooplankton complete daily diel migrations. In the morning, zooplankton sink to the depths of the ocean where predators are scarce, and then come nightfall, they rise back towards ...

  8. Diploastrea heliopora - Wikipedia

    en.wikipedia.org/wiki/Diploastrea_heliopora

    Diploastrea heliopora, commonly known as diploastrea brain coral [3] or honeycomb coral [4] among other vernacular names, is a species of hard coral in the family Diploastreidae. It is the only extant species in its genus. This species can form massive dome-shaped colonies of great size.

  9. Euphyllia ancora - Wikipedia

    en.wikipedia.org/wiki/Euphyllia_ancora

    Euphyllia ancora (reclassified in 2017 as Fimbriaphyllia ancora [2])is a species of hard coral in the family Euphylliidae. [1] It is known by several common names, including anchor coral and hammer coral, or less frequently as sausage coral, ridge coral, or bubble honeycomb coral. [3]

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