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Oxynaspis Gracilis
''Oxynaspis gracilis'' is a species of goose barnacle in the family Oxynaspididae, commonly known as the black coral barnacle because it is normally found attached to black coral. The type specimen was found in Réunion in the East Indies. Description ''Oxynaspis gracilis'' is a small stalked barnacle some in length. The coenosarc (living tissue) of the host coral sometimes grows over the surface of the barnacle. The scutum and carina are separate and the square base of the scutum has the umbo in the middle and set close to the occluded edge.Barnacles (Cirripedia, Thoracica) of seas off Réunion Island. Foster, Brian A.; Buckeridge, John S. Ecology Observations of a number of these barnacles growing on the black coral '' Antipathes atlantica'' and all orienting themselves in one direction against the water current, with their cirri forming a cup-like shape, indicate that the barnacles were actively engaged in intercepting and feeding on plankton. The living tissue of black cor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Knyvett Totton
Arthur is a common male given name of Brythonic origin. Its popularity derives from it being the name of the legendary hero King Arthur. The etymology is disputed. It may derive from the Celtic ''Artos'' meaning “Bear”. Another theory, more widely believed, is that the name is derived from the Roman clan '' Artorius'' who lived in Roman Britain for centuries. A common spelling variant used in many Slavic, Romance, and Germanic languages is Artur. In Spanish and Italian it is Arturo. Etymology The earliest datable attestation of the name Arthur is in the early 9th century Welsh-Latin text '' Historia Brittonum'', where it refers to a circa 5th to 6th-century Briton general who fought against the invading Saxons, and who later gave rise to the famous King Arthur of medieval legend and literature. A possible earlier mention of the same man is to be found in the epic Welsh poem '' Y Gododdin'' by Aneirin, which some scholars assign to the late 6th century, though this is still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plankton
Plankton are the diverse collection of organisms found in Hydrosphere, water (or atmosphere, air) that are unable to propel themselves against a Ocean current, current (or wind). The individual organisms constituting plankton are called plankters. In the ocean, they provide a crucial source of food to many small and large aquatic organisms, such as bivalves, fish and whales. Marine plankton include bacteria, archaea, algae, protozoa and drifting or floating animals that inhabit the saltwater of oceans and the brackish waters of estuaries. Freshwater plankton are similar to marine plankton, but are found in the freshwaters of lakes and rivers. Plankton are usually thought of as inhabiting water, but there are also airborne versions, the aeroplankton, that live part of their lives drifting in the atmosphere. These include plant spores, pollen and wind-scattered seeds, as well as microorganisms swept into the air from terrestrial dust storms and oceanic plankton swept into the air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteria Colymbus
''Pteria colymbus'', the Atlantic winged oyster, is a species of bivalve mollusc in the family Pteriidae. It can be found along the Atlantic coast of North America, ranging from North Carolina to Bermuda and Brazil. Description The Atlantic winged oyster grows to about long and is a distinctive, asymmetric shape. It has a long straight hinge with one wing drawn out a long way and the other one much smaller. The upper valve is brownish, often mottled with paler markings. The lower valve is flatter and smaller and the interior of the shell is pearly grey. The posterior margin is rounded while the anterior margin is elongated and slopes at an acute angle to the hinge. There are a number of indistinct, irregular ribs that flare out from the umbo. These are sparsely covered with blunt spines and there is a fine sculpturing of concentric growth lines. Distribution The Atlantic winged oyster is found in the Western Atlantic at depths between 3 and 30 metres (10 to 100 feet). The range ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shrimp
Shrimp are crustaceans (a form of shellfish) with elongated bodies and a primarily swimming mode of locomotion – most commonly Caridea and Dendrobranchiata of the decapod order, although some crustaceans outside of this order are referred to as "shrimp". More narrow definitions may be restricted to Caridea, to smaller species of either group or to only the marine species. Under a broader definition, ''shrimp'' may be synonymous with prawn, covering stalk-eyed swimming crustaceans with long, narrow muscular tails (abdomens), long whiskers ( antennae), and slender legs. Any small crustacean which resembles a shrimp tends to be called one. They swim forward by paddling with swimmerets on the underside of their abdomens, although their escape response is typically repeated flicks with the tail driving them backwards very quickly. Crabs and lobsters have strong walking legs, whereas shrimp have thin, fragile legs which they use primarily for perching.Rudloe & Rudloe (2009 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uroptychus
''Uroptychus'' is a genus of squat lobsters in the family Chirostylidae found across the Indo-Pacific The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the .... The genus ''Uroptychus'' contains the following species: *''Uroptychus acostalis'' Baba, 1988 *''Uroptychus aguayoi'' Chace, 1939 *''Uroptychus alcocki'' Ahyong & Poore, 2004 *''Uroptychus alius'' Baba, 2005 *''Uroptychus altus'' Baba, 2005 *''Uroptychus amabilis'' Baba, 1979 *'' Uroptychus anacaena'' Baba & Lin, 2008 *'' Uroptychus anatonus'' Baba & Lin, 2008 *''Uroptychus armatus'' (A. Milne-Edwards, 1880) *''Uroptychus atlanticus'' Baba & Wicksten, 2017 *''Uroptychus australis'' (Henderson, 1885) *''Uroptychus babai'' Ahyong & Poore, 2004 *''Uroptychus bacillimanus'' Alcock & Anderson, 1899 *''Uroptychus bellus'' Faxon, 1893 * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squat Lobster
Squat lobsters are dorsoventrally flattened crustaceans with long tails held curled beneath the cephalothorax. They are found in the two superfamilies Galatheoidea and Chirostyloidea, which form part of the decapod infraorder Anomura, alongside groups including the hermit crabs and mole crabs. They are distributed worldwide in the oceans, and occur from near the surface to deep sea hydrothermal vents, with one species occupying caves above sea level. More than 900 species have been described, in around 60 genera. Some species form dense aggregations, either on the sea floor or in the water column, and a small number are commercially fished. Description The two main groups of squat lobsters share most features of their morphology. They resemble true lobsters in some ways, but are somewhat flattened dorsoventrally, and are typically smaller. Squat lobsters vary in carapace length (measured from the eye socket to the rear edge), from in the case of ''Munidopsis aries'', down to o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Remotely Operated Vehicle
A remotely operated underwater vehicle (technically ROUV or just ROV) is a tethered underwater mobile device, commonly called ''underwater robot''. Definition This meaning is different from remote control vehicles operating on land or in the air. ROVs are unoccupied, usually highly maneuverable, and operated by a crew either aboard a vessel/floating platform or on proximate land. They are common in deepwater industries such as offshore hydrocarbon extraction. They are linked to a host ship by a neutrally buoyant tether or, often when working in rough conditions or in deeper water, a load-carrying umbilical cable is used along with a tether management system (TMS). The TMS is either a garage-like device which contains the ROV during lowering through the splash zone or, on larger work-class ROVs, a separate assembly which sits on top of the ROV. The purpose of the TMS is to lengthen and shorten the tether so the effect of cable drag where there are underwater currents is minimize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plumapathes Pennacea
''Plumapathes pennacea'' is a species of black coral in the order Antipatharia. It is found in the tropical Indian, Pacific and Atlantic Oceans in deep reef habitats where it forms part of a biologically diverse community. Description Black corals are so called because the main axial skeleton is made of a spiny, keratin-like substance called "antipathin" which is a dark brownish-black. This colonial coral has a bushy, two dimensional form and grows out of a holdfast firmly anchored to a rock. It can grow to tall and a similar width. The slender branches fork at intervals and divide pinnately, and the smallest pinnules are a few centimetres long and close together, forming a feather-like effect. The polyps are golden brown, brown or blackish, the ones on the pinnules being paler in colour; they may make the axis appear dark red. The size and shape of the polyps vary across the colony, with the polyps most distant from the holdfast being more elongate than the others. Each polyp h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirrus (biology)
In biology, a cirrus , plural ''cirri'', , (from the Latin ''cirrus'' meaning a ''curl-like tuft or fringe'') is a long, thin structure in an animal similar to a tentacle but generally lacking the tentacle's strength, flexibility, thickness, and sensitivity. In the sheep liver fluke, for example, the ''cirrus'' is the worm's muscular penis and when not in use is retained within a ''cirrus sac'' or ''pouch'' near the animal's head. The same structure exists in the various ''Taenia'' species of tapeworm. In the clam worms, however, the cirrus is the tentacular process or growth on each of the feet (''parpodia''), either the ''dorsal cirrus'' or the ''ventral cirrus'', and has nothing to do with reproduction. Among the bristleworms, a cirrus is a tentacular growth near the head or notopodium containing sense organs and may be either dorsal, ventral, or lamellar. Among the ribbonworms, the ''caudal cirrus'' is a small thread-like growth at the posterior end of the worm. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antipathes Atlantica
''Antipathes'' is a genus of coral in the order Antipatharia, composed of black coral (so named for its black skeleton). Distinct features vary greatly within this genus: it contains symmetrically aligned as well as irregularly shaped corals, a range of different colors, and colonies that can be either sparsely branched or closely packed. polyps for these corals have six tentacles that are each lined with stinging cells. Unlike their reef-building cousins, these coral lack photosynthesizing algae and are not restricted to the lighter surface regions. They prefer to live in deeper waters near currents so they can catch and eat passing zooplankton. Species Species included in this genus are: * '' Antipathes aculeata'' (Brook, 1889) * '' Antipathes arborea'' Dana, 1846 * '' Antipathes assimilis'' (Brook, 1889) * '' Antipathes atlantica'' Gray, 1857 * ''Antipathes brooki'' (Whitelegge & Hill, 1899) * ''Antipathes caribbeana'' Opresko, 1996 * ''Antipathes catharinae'' (Pax, 1932 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coenosarc
In corals, the coenosarc is the living tissue overlying the stony skeletal material of the coral. It secretes the coenosteum, the layer of skeletal material lying between the corallites (the stony cups in which the polyps sit). The coensarc is composed of mesogloea between two thin layers of epidermis and is continuous with the body wall of the polyps. The coenosarc contains the gastrovascular canal system that links the polyps and allow them to share nutrients and symbiotic zooxanthellae Zooxanthellae is a colloquial term for single-celled dinoflagellates that are able to live in symbiosis with diverse marine invertebrates including demosponges, corals, jellyfish, and nudibranchs. Most known zooxanthellae are in the genus ''Sy .... References {{reflist Cnidarian anatomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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