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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.
The classification of corals has been discussed for millennia, owing to having similarities to both plants and animals. Aristotle's pupil Theophrastus described the red coral, korallion, in his book on stones, implying it was a mineral, but he described it as a deep-sea plant in his Enquiries on Plants, where he also mentions large stony plants that reveal bright flowers when under water in ...
The Great Barrier Reef Marine Park Authority considers the greatest threat to the Great Barrier Reef to be climate change, causing ocean warming which increases coral bleaching. [ 64 ] [ 65 ] Mass coral bleaching events due to marine heatwaves occurred in the summers of 1998, 2002, 2006, 2016, 2017 and 2020, [ 66 ] [ 13 ] [ 67 ] and coral ...
The coral shelters a host of marine life including fish, crabs and shrimp. It’s also like a living encyclopedia, said San Féliz, containing information about ocean conditions going back ...
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.
Reef sites and lagoons within Malaita Province including Langa Langa Lagoon or Akwalaafu; Lau Lagoon, the coral reef lagoon off the coast of Fanalei and Walande villages on the eastern side of Malaita Island; and Ndai or Dai, which is a small (3 by 7 kilometres (1.9 mi × 4.3 mi) elevated coral reef island 43 km (30 mi) off the northern end of ...
It includes all of the stony corals, most of which are colonial and reef-forming, as well as all sea anemones, and zoanthids, arranged within five extant orders. [2] The hexacorallia are distinguished from another class of Anthozoa, Octocorallia , in having six or fewer axes of symmetry in their body structure; the tentacles are simple and ...
All the genera in this family are colonial, reef-building corals. Skeletal structures are similar to those of Faviidae but are highly fused, without paliform lobes. The valleys are superficial or may be indistinct because of fan-like spreading or contortions in the ridges. Faviidae and Trachyphylliidae are the most closely related families. [1]
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