Ctenella | |
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Ctenella chagius | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Cnidaria |
Class: | Hexacorallia |
Order: | Scleractinia |
Family: | Euphylliidae |
Genus: | Ctenella Matthai, 1928 |
Species: | C. chagius |
Binomial name | |
Ctenella chagius Matthai, 1928 | |
Ctenella is a monotypic genus of stony coral in the family Euphylliidae. It is represented by a single species, Ctenella chagius. These corals are massive in size with meandering valleys between the calyces which have solid, non-porous walls and fine, evenly spaced, solid septae. [2] They are found in the Indian Ocean, Red Sea and Mediterranean Sea. [3] It forms solid, smooth hemispherical domes and is found in the Indian Ocean in the vicinity of the Chagos Archipelago.
Ctenella chagius is a massive, hemispherical, colonial coral with a fissured surface and brain-like appearance. The individual polyps that secrete the stony skeleton project from stony cups called corallites arranged in rows in long meandering valleys. The width between the solid ridges on either side is about 1.5 cm (0.6 in) with the valleys being about 1 cm (0.4 in) deep. The fine septa that radiate from the corallites are closely packed and evenly spaced, some continuing upwards and over the ridges. [4] This coral is a pale brown colour and can grow to a metre (yard) in diameter. It is a zooxanthellate coral and has symbiotic unicellular dinoflagellate algae living within its tissues. [3]
Ctenella chagius is found around the Chagos Islands. It is found in lagoons and on reef slopes at depths of up to 45 metres (148 ft). [1]
Ctenella chagius is listed as being "Endangered" in the IUCN Red List of Threatened Species. The size of its population is unknown but the reefs on which it lives are being degraded at a faster rate than it is likely to be able to establish new colonies. It is very susceptible to coral bleaching and coral diseases, both of which are on the increase as sea temperatures rise. There are also threats to the coral from human activities but the Chagos Islands are now part of the Chagos Marine Protected Area which should provide a measure of protection for this coral. [1]
Acroporidae is a family of small polyped stony corals in the phylum Cnidaria. The name is derived from the Greek "akron" meaning "summit" and refers to the presence of a corallite at the tip of each branch of coral. They are commonly known as staghorn corals and are grown in aquaria by reef hobbyists.
Galaxea fascicularis is a species of colonial stony coral in the family Euphylliidae, commonly known as Octopus coral, Fluorescence grass coral, and Galaxy coral among various vernacular names.
The Meandrinidae are a family of stony corals. The name comes from the Greek, maiandros meaning "meandering", referring to the miniature, winding valleys found between the corallites. Fossil corals in this family have been found dating back to the Cretaceous.
Eusmilia is a genus of stony coral in the family Meandrinidae. It is a monotypic genus represented by the species Eusmilia fastigiata, commonly known as the smooth flower coral. It is found on reefs in the Caribbean Sea.
Siderastrea siderea, commonly known as massive starlet coral or round starlet coral, is a stony coral in the family Siderastreidae. It is found in shallow parts of the western Atlantic Ocean as solid boulder-shaped or domed structures.
Siderastrea radians, also known as the lesser starlet coral or the shallow-water starlet coral, is a stony coral in the family Siderastreidae. It is found in shallow parts of the western Atlantic Ocean as small, solid mounds or encrusting sheets.
Pseudodiploria strigosa, the symmetrical brain coral, is a colonial species of stony coral in the family Mussidae. It occurs on reefs in shallow water in the West Atlantic Ocean and Caribbean Sea. It grows slowly and lives to a great age.
Pseudodiploria clivosa, the knobby brain coral, is a colonial species of stony coral in the family Mussidae. It occurs in shallow water in the West Atlantic Ocean and Caribbean Sea.
Meandrina meandrites, commonly known as maze coral, is a species of colonial stony coral in the family Meandrinidae. It is found primarily on outer coral reef slopes in the Caribbean Sea and the Gulf of Mexico.
Acropora secale is a species of branching staghorn stony coral. It is found in shallow parts of the Indo-Pacific Ocean and the type locality is Sri Lanka. The oldest fossils found date back to the Pleistocene.
Isophyllia sinuosa, the sinuous cactus coral, is a species of stony coral in the family Mussidae. It is found in shallow water in the tropical western Atlantic and the Caribbean Sea.
Lobophyllia corymbosa, also known as lobed cactus coral or brain root coral, is a species of large polyp stony coral in the family Lobophylliidae. It occurs on reefs in shallow waters in the Red Sea, off the coast of East Africa, and in other parts of the tropical Indo-Pacific.
Micromussa lordhowensis, previously known as the Acan Lord, is a species of stony coral in the family Lobophylliidae. It is a widespread and common coral with large polyps occurring on shallow reefs in the Indo-Pacific Ocean. It was originally classified under the genus Acanthastrea, and reclassified under the genus Micromussa in 2016.
Lobophyllia hemprichii, commonly called lobed brain coral, lobed cactus coral or largebrain root coral, is a species of large polyp stony coral in the family Lobophylliidae. It is found in the Indo-Pacific Ocean. In its specific name Christian Gottfried Ehrenberg honoured his late partner the Prussian naturalist Wilhelm Hemprich; they were among the first to study the marine life of the Red Sea.
Cynarina lacrymalis is a species of stony coral in the family Lobophylliidae. It is variously known as the flat cup coral, solitary cup coral, button coral, doughnut coral, or cat's eye coral. It is found in the western Indo-Pacific Ocean and is sometimes kept in reef aquaria.
Favites complanata is a species of stony coral in the family Merulinidae, sometimes known as the larger star coral. It is native to the Indo-Pacific region and its range extends from the Red Sea and Indian Ocean to the western and central Pacific Ocean. This is an uncommon species of coral and seems to be decreasing in abundance, and the International Union for Conservation of Nature has rated its conservation status as being "near threatened".
Oulophyllia crispa, sometimes called the intermediate valley coral, is a species of stony coral in the family Merulinidae. It is native to the tropical western and central Indo-Pacific region. Although this coral has a wide range, it is generally uncommon and seems to be decreasing in abundance, and the International Union for Conservation of Nature has rated its conservation status as being "near threatened".
Goniastrea favulus, also known as the lesser star coral, is a species of stony coral in the family Merulinidae. It occurs in shallow water in the Indo-Pacific region. This is an uncommon species of coral and the International Union for Conservation of Nature has rated its conservation status as being "near threatened".
Manicina areolata, commonly known as rose coral, is a colonial species of stony coral. It occurs in shallow water in the West Atlantic Ocean and Caribbean Sea, sometimes as small solid heads and sometimes as unattached cone-shaped forms.
Horastrea is a monotypic genus of stony coral in the family Coscinaraeidae. It is represented by the single species Horastrea indica, the blister coral. It is native to the southwestern Indian Ocean where it is found in shallow water sandy reefs. It was first described by M Pichon in 1971. It is an uncommon coral and the International Union for Conservation of Nature has assessed it as being a "vulnerable species".