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Aphyonidae
Aphyonidae is a family of eel-like fishes in the order Ophidiiformes. They are found in tropical and subtropical waters throughout the world. They are deep-sea fishes, living between and depth. Description and biology Aphyonids are small fishes, typically about long when fully grown. They have transparent, gelatinous skin, which lacks any scales. The dorsal, caudal and anal fins are united into a single ribbon. Most species are neotenic, showing a number of features as adults that are more commonly associated with fish larvae. For example, the skeleton is only partially calcified, and the muscles and gills are underdeveloped. The eyes, nasal organ and lateral line are also reduced, and they lack a swim bladder. The aphyonids are viviparous, giving birth to live young. The males bundle their sperm into small sacs (spermatophore A spermatophore or sperm ampulla is a capsule or mass containing spermatozoa created by males of various animal species, especially salamanders and ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barathronus
''Barathronus'' is a genus of deep-sea fish that are placed in the family Aphyonidae (blind cusk eels) or family Bythitidae (brotulas), depending on the source. Life cycle ''Barathronus'' are viviparous deep-sea fish. However, a juvenile '' Barathronus pacificus'' has been recorded in shallow waters. Based on the stable oxygen isotope composition of otoliths, at least one species, '' Barathronus maculatus'', has a pelagic larval stage, followed by an ontogenetic vertical migration to deeper waters. Species There are currently 10 recognized species in this genus, although the exact species differ between the FishBase and the Catalog of Fishes: * '' Barathronus affinis'' A. B. Brauer, 1906 * '' Barathronus bicolor'' Goode & T. H. Bean, 1886 * '' Barathronus bruuni'' J. G. Nielsen, 1969 * ''Barathronus diaphanus'' A. B. Brauer, 1906 * '' Barathronus linsi'' J. G. Nielsen, Mincarone & di Dario, 2015 — not listed in the FishBase * '' Barathronus maculatus'' Shcherbac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aphyonus
''Aphyonus'' is a genus of blind cusk eels from the family Aphyonidae. It contains four species. A sampling of specimens of ''Aphyonus'' showed that the type species of ''Aphyonus'', '' A. gelatinosus'', was not closely related to the other known species in the genus, and a new genus ''Paraphyonus'' was named for these, including two newly identified species. The result of this classification is that ''Aphyonus'' would be a monotypic genus. Species The four species of ''Aphyonus'' are: *'' Aphyonus bolini'' Nielsen, 1974 *'' Aphyonus brevidorsalis'' Nielsen, 1969 *'' Aphyonus gelatinosus ''Aphyonus gelatinosus'' also known as the gelatinous blindfish is a species of blind cusk eel found in eastern Atlantic Ocean from Azores and Canary Islands; western Indian Ocean in Natal, South Africa and southwest Pacific Ocean known in Aust ...'' Günther, 1878 *'' Aphyonus rassi'' Nielsen, 1975 References Aphyonidae Ray-finned fish genera Taxa named by Albert Günther [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteoria
''Meteoria erythrops'' is a species of blind cusk eel Aphyonidae is a family of eel-like fishes in the order Ophidiiformes. They are found in tropical and subtropical waters throughout the world. They are deep-sea fishes, living between and depth. Description and biology Aphyonids are small fishe ... native to the Atlantic Ocean where it is found at depths of from . This species grows to a length of SL. This is the only known species in its genus. References * Aphyonidae Fish described in 1969 {{Ophidiiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nybelinella
''Nybelinella'' is a genus of blind cusk eels. Species There are currently two recognized species in this genus: * '' Nybelinella brevidorsalis'' Shcherbachev Dmitry Grigoryevich Shcherbachev (russian: Дми́трий Григо́рьевич Щербачёв; tr. ; 18 January 1932) was a general in the Russian Army during World War I and one of the leaders of the White Movement during the Russian C ..., 1976 * '' Nybelinella erikssoni'' ( Nybelin, 1957) References Aphyonidae {{Ophidiiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyonus
''Paraphyonus'' is a genus of blind cusk eels found in the Atlantic, Indian and Pacific Oceans. This genus was created for species formerly classified under '' Aphyonus'' when sampling of specimens showed that the type species of ''Aphyonus'', '' A. gelatinosus'', was not closely related to the other known species in the genus, including the newly identified species ''P. iselini'' and ''P. merretti''. This work also brought ''Barathronus solomonensis'' into the new genus. The result of this classification is that ''Aphyonus'' would be a monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ... genus. Species There are currently 6 recognized species in this genus: * '' Paraphyonus bolini'' ( J. G. Nielsen, 1974) * '' Paraphyonus brevidorsalis'' ( J. G. Nielsen, 1969) * '' Par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasciadonus
''Parasciadonus'' is a genus of blind cusk eel Aphyonidae is a family of eel-like fishes in the order Ophidiiformes. They are found in tropical and subtropical waters throughout the world. They are deep-sea fishes, living between and depth. Description and biology Aphyonids are small fishe ...s found in the western Pacific Ocean. Species There are currently two recognized species in this genus: * '' Parasciadonus brevibrachium'' J. G. Nielsen, 1984 * '' Parasciadonus pauciradiatus'' J. G. Nielsen, 1997 References Aphyonidae {{Ophidiiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sciadonus
''Sciadonus'' is a genus of blind cusk eels. The generic name is derived from Greek σκίαινα (''skíaina'', “sea-fish, red mullet") and ὄνος (''onos'', " hake"). Species There are currently four recognized species in this genus: * '' Sciadonus cryptophthalmus'' ( Zugmayer, 1911) * ''Sciadonus galatheae'' ( J. G. Nielsen, 1969) * ''Sciadonus jonassoni'' ( Nybelin, 1957) * ''Sciadonus pedicellaris ''Sciadonus'' is a genus of blind cusk eels. The generic name is derived from Greek σκίαινα (''skíaina'', “sea-fish, red mullet") and ὄνος (''onos'', " hake"). Species There are currently four recognized species in this genus: ...'' Garman, 1899 References Aphyonidae {{Ophidiiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophidiiformes
Ophidiiformes is an order of ray-finned fish that includes the cusk-eels (family Ophidiidae), pearlfishes (family Carapidae), viviparous brotulas (family Bythitidae), and others. Members of this order have small heads and long slender bodies. They have either smooth scales or no scales, a long dorsal fin and an anal fin that typically runs into the caudal fin. They mostly come from the tropics and subtropics, and live in both freshwater and marine habitats, including abyssal depths. They have adopted a range of feeding methods and lifestyles, including parasitism. The majority are egg-laying, but some are viviparous. Distribution This order includes a variety of deep-sea species, including the deepest known, '' Abyssobrotula galatheae'', found at in the Puerto Rico Trench. Many other species, however, live in shallow water, especially near coral reefs, while a few inhabit freshwater. Most species live in tropical or subtropical habitats, but some species are known from as far n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Starr Jordan
David Starr Jordan (January 19, 1851 – September 19, 1931) was the founding president of Stanford University, serving from 1891 to 1913. He was an ichthyologist during his research career. Prior to serving as president of Stanford University, he had served as president of Indiana University from 1884 to 1891. Starr was also a strong supporter of eugenics, and his published views expressed a fear of "race-degeneration" and asserted that cattle and human beings are "governed by the same laws of selection". He was an antimilitarist since he believed that war killed off the best members of the gene pool, and he initially opposed American involvement in World War I. Early life and career Jordan was born in Gainesville, New York, and grew up on a farm in upstate New York. His parents made the unorthodox decision to educate him at a local girls' high school. His middle name, Starr, does not appear in early census records, and was apparently self-selected; he had begun using ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Larvae
A larva (; plural larvae ) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle. The larva's appearance is generally very different from the adult form (''e.g.'' caterpillars and butterflies) including different unique structures and organs that do not occur in the adult form. Their diet may also be considerably different. Larvae are frequently adapted to different environments than adults. For example, some larvae such as tadpoles live almost exclusively in aquatic environments, but can live outside water as adult frogs. By living in a distinct environment, larvae may be given shelter from predators and reduce competition for resources with the adult population. Animals in the larval stage will consume food to fuel their transition into the adult form. In some organisms like polychaetes and barnacles, adults are immobil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viviparous
Among animals, viviparity is development of the embryo inside the body of the parent. This is opposed to oviparity which is a reproductive mode in which females lay developing eggs that complete their development and hatch externally from the mother. The term 'viviparity' and its adjective form 'viviparous' derive from the Latin ''vivus'' meaning "living" and ''pario'' meaning "give birth to". Reproductive mode Five modes of reproduction have been differentiated in animals based on relations between zygote and parents. The five include two nonviviparous modes: ovuliparity, with external fertilisation, and oviparity, with internal fertilisation. In the latter, the female lays zygotes as eggs with a large yolk; this occurs in all birds, most reptiles, and some fishes. These modes are distinguished from viviparity, which covers all the modes that result in live birth: *Histotrophic viviparity: the zygotes develop in the female's oviducts, but find their nutrients by oophagy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swim Bladder
The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled Organ (anatomy), organ that contributes to the ability of many bony fish (but not cartilaginous fish) to control their buoyancy, and thus to stay at their current water depth without having to expend energy in swimming. Also, the Dorsum (biology), dorsal position of the swim bladder means the center of mass is below the centroid, center of volume, allowing it to act as a stabilizing agent. Additionally, the swim bladder functions as a resonator, resonating chamber, to produce or receive sound. The swim bladder is evolutionarily Homology (biology), homologous to the lungs. Charles Darwin remarked upon this in ''On the Origin of Species''.Darwin, Charles (1859''Origin of Species''Page 190, reprinted 1872 by D. Appleton. Darwin reasoned that the lung in air-breathing vertebrates had derived from a more primitive swim bladder. In the embryonic stages, some species, such as Ophioblennius atlanticus, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
