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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. Coral belongs to the class Anthozoa in the animal phylum Cnidaria, which includes sea anemones and ...
Chuuk Lagoon is part of the larger Caroline Islands group. The area consists of eleven major islands (corresponding to the eleven municipalities of Truk lagoon, which are Tol, Udot, Fala-Beguets, Romanum, and Eot of Faichuk group, and Weno, Fefen, Dublon, Uman, Param, and Tsis of Nomoneas group) and 46 smaller ones within the lagoon, plus 41 on the fringing coral reef, and is known today as ...
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 ...
Reef Check is an international non-governmental organization dedicated to the conservation of two reef ecosystems: tropical coral reefs and Californian rocky reefs. The Foundation is headquartered in Los Angeles, California, United States, but uses data from volunteer scuba diver teams in over 80 countries, ranging from Australia, Japan, to even Germany.
Grooved brain coral, Caribbean Sea, Vieques, Puerto Rico. This species of reef-building coral has a hemispherical, brain-like shape with a brown, yellow, or grey colour. [8] It has characteristic deep, interconnected double-valleys. These polyp-bearing valleys are each separated by grooved ambulacral ridges. There may be a difference in colour ...
The rocks are in the western part of a lagoon surrounded by a submerged coral reef, over which the waves break, and that extends 4.5 km (2.8 mi) east-west and 1.7 km (1.1 mi) north-south, with an area of roughly 5 km 2 within the rim of the reef. The lagoon is 3 to 4.6 meters deep, but there are numerous coral heads of lesser depths throughout ...
Coral reefs are usually found in specific zones. These zones depict different habitats. The known zones are the fore reef, reef crest, and backreef. All zones are connected and have important roles in the growth and development of the reefs. Coral reefs that are found surrounding islands were created when islands recede into the ocean. [5]
The Moorish idol lives between depths of 1 to 180 m in turbid lagoons, reef flats, and clear rocky and coral reefs. As with many reef fishes, habitat has been found to be an important and influential factor in the abundance of Moorish idols. [16] Moorish idol Distribution according to IUCN [1]