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Coral - Wikipedia
https://en.wikipedia.org/wiki/Coral
webCorals are colonial marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.
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Coral | Definition, Types, Location, & Facts | Britannica
https://www.britannica.com/animal/coral
webMar 3, 2024 · Coral, any of a variety of invertebrate marine organisms of the class Anthozoa that are characterized by skeletons—external or internal—of a stonelike, horny, or leathery consistency. The term coral is also applied to the skeletons of those animals, particularly to those of the stonelike corals.
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Coral - National Geographic Society
https://www.nationalgeographic.org/encyclopedia/coral/
webOct 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 ...
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Corals | National Geographic
https://www.nationalgeographic.com/animals/invertebrates/facts/corals-1
webPhoto Ark. Corals. 3:37. WATCH: Coral Reefs 101. 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...
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Coral Reefs - National Geographic Society
https://www.nationalgeographic.org/article/coral-reefs/
webOct 19, 2023 · ARTICLE. Coral Reefs. Learn the risks our world's coral reefs are facing and what they mean for our future and the future of the ocean. Grades. 6 - 12+. Subjects. Biology, Ecology, Health, Earth Science, Oceanography, …
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Coral reef | Description, Geochemistry, Origins, & Threats
https://www.britannica.com/science/coral-reef
web2 days ago · 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.
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Coral reef - Wikipedia
https://en.wikipedia.org/wiki/Coral_reef
webt. e. 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.
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Corals - National Geographic Society
https://www.nationalgeographic.org/topics/corals/
webCorals are small marine animals. The “hard” type of coral grows with the help of algae, which gives it color and nutrients that help it form a sturdy, stony skeleton. Reefs, which form through the accumulation of hard coral, are a vital ecosystem, supporting an estimated 25 percent of ocean species.
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Coral Reefs and Corals | Smithsonian Ocean
https://ocean.si.edu/ocean-life/invertebrates/corals-and-coral-reefs
webWhat Are Corals? Animal, Vegetable & Mineral. The brownish-green specks are the zooxanthellae that most shallow, warm-water corals depend on for much of their food. (© osf.co.uk. All rights reserved.) Corals are related to sea anemones, and they all share the same simple structure, the polyp.
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Coral reef ecosystems - National Oceanic and Atmospheric …
https://www.noaa.gov/education/resource-collections/marine-life/coral-reef-ecosystems
webFeb 1, 2019 · marine life. education. 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.
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