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Thaumatichthys Axeli
Prince Axel's wonderfish (''Thaumatichthys axeli'') is a bottom-dwelling deep-sea anglerfish of the family Thaumatichthyidae. ''Thaumatichthys axeli'' lives at a depth of around 3,600 meters (in the abyssal zone), deeper than any other member of the genus ''Thaumatichthys''. As with other members of the family, they possess a distinctive forked light organ inside their mouth, which they use to lure prey. Large, curved teeth "fringe the upper jaw like a comb". Specimens have been found measuring up to about 50 cm.Bruun, A. F., et al. (1956). The Galathea Deep Sea Expedition, 1950–52.. London: Allen and Unwin. pp. 174-177 History ''Thaumatichthys axeli'' was discovered during the Galathea expedition of 1950–1952. Anton Bruun described it as "unquestionably the strangest catch of the Galathea Expedition, and altogether one of the oddest creatures in the teeming variety of the fish world." On discovery, it was thought to represent a new genus, and was given the name ''Gal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anton Frederik Bruun
Anton Frederik Bruun (14 December 1901 – 13 December 1961) was a Danish oceanographer and ichthyologist. Educated at University of Copenhagen (1926) and employed at the Danish Commission for Marine Research (Kommissionen for Danmarks Fiskeri- og Havundersøgelser), where he participated in the third Dana expedition (1928-1930). From 1938 employed at the Zoological Museum of Copenhagen University. In 1945-46 scientific leader of the Atlantide expedition along the coast of West Africa and in 1950-1952 scientific leader of the Galathea deep-sea expedition, which circumnavigated the world. He became the first president of the Intergovernmental Oceanographic Commission, under UNESCO and was a leading figure in establishing international organisations for the exploration of the seas. The R/V ''Anton Bruun'' (former US presidential yacht ) was named after him, as was the underwater bioacoustic research facility " Station Oceanographique Anton Bruun", in Strib, Denmark ) , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benthic
The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from ancient Greek, βένθος (bénthos), meaning "the depths." Organisms living in this zone are called benthos and include microorganisms (e.g., bacteria and fungi) as well as larger invertebrates, such as crustaceans and polychaetes. Organisms here generally live in close relationship with the substrate and many are permanently attached to the bottom. The benthic boundary layer, which includes the bottom layer of water and the uppermost layer of sediment directly influenced by the overlying water, is an integral part of the benthic zone, as it greatly influences the biological activity that takes place there. Examples of contact soil layers include sand bottoms, rocky outcrops, coral, and bay mud. Description Oceans The benthic region of the ocean begins at the shore line (intertidal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anglerfish
The anglerfish are fish of the teleost order Lophiiformes (). They are bony fish named for their characteristic mode of predation, in which a modified luminescent fin ray (the esca or illicium) acts as a lure for other fish. The luminescence comes from symbiotic bacteria, which are thought to be acquired from seawater, that dwell in and around the sea. Some anglerfish are notable for extreme sexual dimorphism and sexual symbiosis of the small male with the much larger female, seen in the suborder Ceratioidei, the deep sea anglerfish. In these species, males may be several orders of magnitude smaller than females. Anglerfish occur worldwide. Some are pelagic (dwelling away from the sea floor), while others are benthic (dwelling close to the sea floor). Some live in the deep sea (such as the Ceratiidae), while others on the continental shelf, such as the frogfishes and the Lophiidae (monkfish or goosefish). Pelagic forms are most often laterally compressed, whereas the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thaumatichthyidae
Thaumatichthyidae, the wolftrap anglers, is a small family of deep-sea anglerfishes, containing two genera and eight species found in all oceans. They are commonly known as wolftrap anglers or wolftrap seadevils because of their distinctive upper jaws with movable premaxillaries that can be lowered to form a cage-like trap around the much shorter lower jaw. They are related to (and were formerly placed within) the family Oneirodidae The dreamers are a family, Oneirodidae, of deep-sea anglerfishes in the order Lophiiformes. They are the largest and most diverse group of deep-sea anglerfish, and also the least well known with 16 genera represented by only one, two, or three f .... References Deep sea fish Marine fish families {{Lophiiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abyssal Zone
The abyssal zone or abyssopelagic zone is a layer of the pelagic zone of the ocean. "Abyss" derives from the Greek word , meaning bottomless. At depths of , this zone remains in perpetual darkness. It covers 83% of the total area of the ocean and 60% of Earth's surface. The abyssal zone has temperatures around through the large majority of its mass. Due to there being no light, there are no plants producing oxygen, which instead primarily comes from ice that had melted long ago from the polar regions. The water along the seafloor of this zone is actually devoid of oxygen, resulting in a death trap for organisms unable to quickly return to the oxygen-enriched water above. This region also contains a much higher concentration of nutrient salts, like nitrogen, phosphorus, and silica, due to the large amount of dead organic material that drifts down from the above ocean zones and decomposes. The water pressure can reach up to 76 megapascal. The area below the abyssal zone is the sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thaumatichthys
The Wonderfish (''Thaumatichthys'') is a genus of deep-sea anglerfish in the family Thaumatichthyidae, with three known species. Its scientific name means "wonder-fish" in Greek; oceanographer Anton Bruun described these fishes as "altogether one of the oddest creatures in the teeming variety of the fish world." In contrast to other anglerfishes, the bioluminescent lure (called the "esca") of ''Thaumatichthys'' is located inside its cavernous mouth. They are worldwide in distribution and are ambush predators living near the ocean floor. Taxonomy The first specimen of ''Thaumatichthys'' was collected by an American expedition in Indonesia in 1908 and given the species name ''pagidostomus'' ("trap-mouthed"). A subsequent specimen from the north Atlantic was placed by Regan and Trewavas (1932) into a new genus, ''Amacrodon'', based on differences in dentition. Bruun assigned a specimen collected by the Galathea Expedition of 1950–52 to a third genus, ''Galatheathauma'' ("Ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bioluminescence
Bioluminescence is the production and emission of light by living organisms. It is a form of chemiluminescence. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms including some bioluminescent bacteria, and terrestrial arthropods such as fireflies. In some animals, the light is bacteriogenic, produced by symbiotic bacteria such as those from the genus ''Vibrio''; in others, it is autogenic, produced by the animals themselves. In a general sense, the principal chemical reaction in bioluminescence involves a light-emitting molecule and an enzyme, generally called luciferin and luciferase, respectively. Because these are generic names, luciferins and luciferases are often distinguished by the species or group, e.g. firefly luciferin. In all characterized cases, the enzyme catalyzes the oxidation of the luciferin. In some species, the luciferase requires other cofactors, such as calcium or magnesium ions, and somet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galathea Expeditions
The ''Galathea'' expeditions comprise a series of three Danish ship-based scientific research expeditions in the 19th, 20th and 21st centuries, carried out with material assistance from the Royal Danish Navy and, with regard to the second and third expeditions, under the auspices of the Danish Expedition Foundation. All three expeditions circumnavigated the world from west to east and followed similar routes. First expedition Preparations The first ''Galathea'' Expedition took place from 1845 to 1847 and had political and scientific objectives. It was initiated by the King of Denmark, Christian VIII, with its main purposes the handover of the Danish colonies in India, following their sale to the British East India Company, as well as a final Danish attempt to explore and recolonise the Nicobar Islands in the Indian Ocean. Additional aims were the expansion of trade with China and the discovery of new trading opportunities, as well as making extensive scientific collections.B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prince Axel Of Denmark
Prince Axel of Denmark, (Danish: ''Prins Axel Christian Georg til Danmark''; 12 August 1888 – 14 July 1964) was a member of the Danish royal family. He was the second son of Prince Valdemar of Denmark and Princess Marie of Orléans, and a grandson of King Christian IX of Denmark. On his father's side, he was a first cousin of King Christian X of Denmark, King Haakon VII of Norway and his wife Queen Maud, King Constantine I of Greece, King George V of the United Kingdom, Emperor Nicholas II of Russia, Ernest Augustus III, Duke of Brunswick and Prince Andrew of Greece and Denmark, father of Prince Philip, Duke of Edinburgh, and on his mother's side of Henri, Count of Paris (1908–1999), Orleanist pretender to the French throne. Prince Axel was a popular patron of sports. He was a prominent International Olympic Committee member and activist and also a business executive. In 1963, Prince Axel became the first honorary member of the IOC in history. He was an officer in the Royal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thaumatichthys Pagidostomus
''Thaumatichthys pagidostomus'' is a species of wonderfish found in the Indian and Atlantic Oceans at a depth of around . This species grows to a length of TL. This species has relatively longer premaxillaries than the other species (measuring 33% of standard length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish m ...), and the anterior premaxillary teeth are long. References * Thaumatichthyidae Fish described in 1912 {{Lophiiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Anton Frederik Bruun
In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were set forth in Carl Linnaeus's system in ''Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first made widely available in 1805 in the intr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
