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Acanthastrea
''Acanthastrea'' is a genus of large polyp stony corals in the family Lobophylliidae. The colonies are massive and usually flat. The corallites are either circular or angular in shape. The septa are thick near the wall of the corallite, becoming thin near the columella, and have tall teeth. The polyps are extended only at night. The genus contains the following species: * ''Acanthastrea brevis'' Milne Edwards & Haime, 1849 * ''Acanthastrea echinata'' (Dana, 1846) * ''Acanthastrea hemprichii'' (Ehrenberg, 1834) * ''Acanthastrea minuta'' Moll & Best, 1984 * ''Acanthastrea pachysepta'' (Chevalier, 1975) * ''Acanthastrea polygonalis''† Martin, 1880 * ''Acanthastrea rotundoflora'' Chevalier, 1975 * ''Acanthastrea subechinata ''Acanthastrea'' is a genus of large polyp stony corals in the family Lobophylliidae. The colonies are massive and usually flat. The corallite A corallite is the skeletal cup, formed by an individual stony coral polyp, in which the polyp ...'' Vero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthastrea Subechinata
''Acanthastrea'' is a genus of large polyp stony corals in the family Lobophylliidae. The colonies are massive and usually flat. The corallite A corallite is the skeletal cup, formed by an individual stony coral polyp, in which the polyp sits and into which it can retract. The cup is composed of aragonite, a crystalline form of calcium carbonate, and is secreted by the polyp. Corallit ...s are either circular or angular in shape. The septa are thick near the wall of the corallite, becoming thin near the columella, and have tall teeth. The polyps are extended only at night. The genus contains the following species: * '' Acanthastrea brevis'' Milne Edwards & Haime, 1849 * '' Acanthastrea echinata'' (Dana, 1846) * '' Acanthastrea hemprichii'' (Ehrenberg, 1834) * '' Acanthastrea minuta'' Moll & Best, 1984 * '' Acanthastrea pachysepta'' (Chevalier, 1975) * '' Acanthastrea polygonalis''† Martin, 1880 * '' Acanthastrea rotundoflora'' Chevalier, 1975 * '' Acanthastrea subec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthastrea Hemprichii
''Acanthastrea'' is a genus of large polyp stony corals in the family Lobophylliidae. The colonies are massive and usually flat. The corallites are either circular or angular in shape. The septa are thick near the wall of the corallite, becoming thin near the columella, and have tall teeth. The polyps are extended only at night. The genus contains the following species: * '' Acanthastrea brevis'' Milne Edwards & Haime, 1849 * '' Acanthastrea echinata'' (Dana, 1846) * '' Acanthastrea hemprichii'' (Ehrenberg, 1834) * '' Acanthastrea minuta'' Moll & Best, 1984 * '' Acanthastrea pachysepta'' (Chevalier, 1975) * '' Acanthastrea polygonalis''† Martin, 1880 * '' Acanthastrea rotundoflora'' Chevalier, 1975 * ''Acanthastrea subechinata ''Acanthastrea'' is a genus of large polyp stony corals in the family Lobophylliidae. The colonies are massive and usually flat. The corallite A corallite is the skeletal cup, formed by an individual stony coral polyp, in which the polyp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthastrea Echinata
''Acanthastrea echinata'', commonly known as the starry cup coral, is a species of corals in the family Lobophylliidae. It is a wide-ranging species found from the western Indian Ocean, throughout the Pacific Ocean, and eastward to the southeastern Atlantic Ocean. It can inhabit any reef habitat to depths of 50 m. This species, which may become threatened with the global decline of coral reefs, is a popular coral used in aquariums. Description ''A. echinata'' colonies crustlike to very thick and reach up to about a meter across. The thick-walled, circular corallites are cerioid or subplocoid. The septa have large teeth. The skeleton is covered with a folded fleshy tissue. They are usually dull in color, coming in shades of gray, brown, or green, but some can be bright and colorful. They are a uniform color or mottled.''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthastrea Rotundoflora
''Acanthastrea rotundoflora'' is a species of coral found in Indo-Pacific waters from the Red Sea to Australia and the East China Sea. The species in uncommon throughout its range, and is threatened by the global loss of coral reef habitats. Description Colonies of ''Acanthastrea rotundoflora'' are either massive or encrusting. The corallites are plocoid and rather widely separated, and in small colonies there is a conspicuous central corallite. The septa have long pointed teeth. The general colour of this coral is rusty-brown, dark brown or green. Biology ''Acanthastrea rotundoflora'' is a zooxanthellate species of coral. It obtains most of its nutritional needs from the symbiotic dinoflagellates that live inside its soft tissues. These photosynthetic organisms provide the coral with organic carbon and nitrogen, sometimes providing up to 90% of their host's energy needs for metabolism and growth. Its remaining needs are met by the planktonic organisms caught by the tentac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthastrea Brevis
''Acanthastrea brevis'' is a vulnerable species of stony coral found in reef habitats at depths of 1–20 m. It is threatened by habitat loss and crown-of-thorns starfish predation. It is particularly susceptible to coral bleaching and ocean acidification. Distribution It is widespread and found from the waters of Madagascar and Saudi Arabia in the Indian Ocean to Micronesia and Samoa in the Pacific. Biology ''Acanthastrea brevis'' is a zooxanthellate species of coral. It obtains most of its nutritional needs from the symbiotic dinoflagellates that live inside its soft tissues. These photosynthetic Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Some of this chemical energy is stored in c ... organisms provide the coral with organic carbon and nitrogen, sometimes providing up to 90% of their host's energy needs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lobophylliidae
Lobophylliidae is a family of large polyp stony corals. The family was created in 2009 after a revision of the "robust" families of Faviidae, Merulinidae, Mussidae and Pectiniidae, which had been shown to be polyphyletic. The family Lobophylliidae was formed out of the Indo-Pacific species that had traditionally been included in Mussidae, and some of the species which had previously formed Pectiniidae, the remaining species from Pectiniidae having been merged into Merulinidae. The type genus is '' Lobophyllia''. Taxonomy The "robust" stony coral families of Faviidae, Merulinidae, Mussidae and Pectiniidae, have traditionally been recognised on morphological grounds but recent molecular analysis has shown that these families are polyphyletic, the similarities between the species having occurred through convergent evolution. Additionally, some traditional genera such as ''Favia'' and '' Scolymia'' have been found to be polyphyletic, with the Atlantic faviids and scolymids being m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coral
Corals are 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. 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. A set of tentacles surround a central mouth opening. Each polyp excretes an exoskeleton near the base. Over many generations, the colony thus creates a skeleton characteristic of the species which can measure up to several meters in size. Individual colonies grow by asexual reproduction of polyps. Corals also breed sexually by spawning: polyps of the same species release gametes simultaneously overnight, often around a full moon. Fertilized eggs form planulae, a mobile early form of the coral polyp which, when matu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colony (biology)
In biology, a colony is composed of two or more conspecific individuals living in close association with, or connected to, one another. This association is usually for mutual benefit such as stronger defense or the ability to attack bigger prey. Colonies can form in various shapes and ways depending on the organism involved. For instance, the bacterial colony is a cluster of identical cells (clones). These colonies often form and grow on the surface of (or within) a solid medium, usually derived from a single parent cell. Colonies, in the context of development, may be composed of two or more unitary (or solitary) organisms or be modular organisms. Unitary organisms have determinate development (set life stages) from zygote to adult form and individuals or groups of individuals (colonies) are visually distinct. Modular organisms have indeterminate growth forms (life stages not set) through repeated iteration of genetically identical modules (or individuals), and it can be diffi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corallite
A corallite is the skeletal cup, formed by an individual stony coral polyp, in which the polyp sits and into which it can retract. The cup is composed of aragonite, a crystalline form of calcium carbonate, and is secreted by the polyp. Corallites vary in size, but in most colonial corals they are less than in diameter. The inner surface of the corallite is known as the calyx. The vertical blades inside the calyx are known as septa and in some species, these ridges continue outside the corallite wall as costae In vertebrate anatomy, ribs ( la, costae) are the long curved bones which form the rib cage, part of the axial skeleton. In most tetrapods, ribs surround the chest, enabling the lungs to expand and thus facilitate breathing by expanding the c .... Where there is no corallite wall, the blades are known as septocostae. The septa, costae and septocostae may have ornamentation in the form of teeth and may be thick, thin or variable in size. Sometimes there are paliform l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
