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Pavona clavus is a cream, yellow, brown, or pale grey coral typically forming columnar or club-shaped colonies, though it may also form flattened plates. [3] [4] The columns are generally smooth and uniform in size, typically measuring up to 20 cm (7.9 in) tall and 3–5 cm (1.2–2.0 in) in diameter. [3] They are capable of dividing but not ...
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 ...
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.
National Geographic scientists recently discovered the world's largest coral colony in the southwest Pacific Ocean, deemed the "mega" coral.. The National Geographic Society's Pristine Seas team ...
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.
Colony shape may occasionally be flat-topped discs, particularly when younger. As a type of brain coral , the surface of the skeleton is a network of winding, curving valleys and ridges (or walls) that roughly resemble the familiar folding architecture of the mammal cerebrum .
The coral reef on the north side of the island includes colonies more than 2 metres (6.6 ft) high. The 2018 Tara Pacific expedition located five colonies of Millepora platyphylla at depths of 28–32 metres (92–105 ft), the first of this fire coral species known in the region. [ 90 ]
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