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Anarhichas
''Anarhichas'' is a genus of marine ray-finned fishes belonging to the family Anarhichadidae, the wolffishes or sea wolves. These fishes are found in the northern North Atlantic and North Pacific oceans. Taxonomy ''Anarhichas'' was first proposed as a genus by Carl Linnaeus in the 10th edition of the '' Systema Naturae'' when he described its type species ''A. lupus'', from the "northern English Ocean". The genus is one of two genera in the family Anarhichadidae, which is classified within the order Scorpaeniformes in the suborder Zoarcoidei by the 5th edition of Fishes of the World. The genus name ''Anarhichas'' is an Ancient Greek name for the Atlantic wolffish (''A. lupus'') and means “the climber,” in turn derived from the Greek ''anarrhichesis'' which means, “to climb or scramble up” , this may be an allusion to the ancient belief that wolffishes left the water and climbed up on the rocks. Species ''Anarhichas'' has four species classified within it: * ''Anarhic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anarhichas Denticulatus
''Anarhichas'' is a genus of marine ray-finned fishes belonging to the family Anarhichadidae, the wolffishes or sea wolves. These fishes are found in the northern North Atlantic and North Pacific oceans. Taxonomy ''Anarhichas'' was first proposed as a genus by Carl Linnaeus in the 10th edition of the ''Systema Naturae'' when he described its type species ''A. lupus'', from the "northern English Ocean". The genus is one of two genera in the family Anarhichadidae, which is classified within the order Scorpaeniformes in the suborder Zoarcoidei by the 5th edition of Fishes of the World. The genus name ''Anarhichas'' is an Ancient Greek name for the Atlantic wolffish (''A. lupus'') and means “the climber,” in turn derived from the Greek ''anarrhichesis'' which means, “to climb or scramble up” , this may be an allusion to the ancient belief that wolffishes left the water and climbed up on the rocks. Species ''Anarhichas'' has four species classified within it: * '' Anarhichas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anarhichas Minor
''Anarhichas minor'', the spotted wolffish, spotted sea cat or leopardfish, is a large marine fish of the family Anarhichadidae. This bottom-dwelling species is found across the North Atlantic and adjacent parts of the Arctic Ocean from north of Russia and the Scandinavian Peninsula to the Scotian Shelf, off Nova Scotia, Canada. In Canada the population declined by about 90% from the late 1970s through the early 1990s, particularly in the northern part of its range. In Canada it is classified as a threatened species. Taxonomy ''Anarhichas minor'' was first formally described in 1772 by the Icelandic explorer, writer and conservator of the Icelandic language Eggert Ólafsson with the type locality given as Iceland. It is one of four species of wolffishes in the genus ''Anarhichas''. The specific name ''minor'' should mean "smaller" or "lesser", however Olafsson meant it to be "latter" as this was the second wolffish species to be described. General description They have promi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anarhichas Orientalis
''Anarhichas orientalis'', the Bering wolffish, is a marine fish in the family Anarhichadidae, the "wolffish". Description The Bering wolffish has an elongate and laterally compressed body, with a thin caudal peduncle. It has a steep snout, and, like other wolffish, has long, canine teeth that protrude out past the tips of the jaws. It can grow to 112 cm and 15 kg in weight, is dark brown in colour and lacks any distinct markings other than some slight blotching or palish marbling. The head of juveniles may have multiple dark spots and four to five dark coloured longitudinal stripes on the upper body. The head length is approximately 19 to 21 percent of the total body length. This species differs from the five other species in the genus in having at least 53 anal rays, 81 to 86 dorsal fin spines, and more rounded, deeper caudal fins. Distribution The Bering wolffish species has an inconsistent distribution. It is found from the Northeastern Pacific Ocean from Hokkai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anarhichadidae
Anarhichadidae, the wolffishes, sea wolves or wolf eels, is a family of marine ray finned fishes belonging to the order Scorpaeniformes. These are predatory, eel shaped fishes which are native to the cold waters of the Arctic, North Pacific and North Atlantic Oceans. Taxonomy Anarhichadidae was first proposed as a family in 1832 by the French zoologist Charles Lucien Bonaparte. The 5th edition of '' Fishes of the World'' classifies this family within the suborder Zoarcoidei, within the order Scorpaeniformes. Other authorities classify this family in the infraorder Zoarcales wihin the suborder Cottoidei of the Perciformes because removing the Scorpaeniformes from the Perciformes renders that taxon non monophyletic. Etymology Anarhichadidae is derived from the name of its type genus ''Anarhichas'' which is an Ancient Greek name for the Atlantic wolffish (''A. lupus'') and means "the climber", in turn derived from the Greek ''anarrhichesis'' which means "to climb or scramble u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoarcoidei
Zoarcoidei is a suborder of marine ray-finned fishes belonging to the order Scorpaeniformes. The suborder includes the wolffishes, gunnels and eelpouts. The suborder includes about 400 species. These fishes predominantly found in the boreal seas of the northern hemisphere but they have colonised the southern hemisphere. Taxonomy Zoarcoidei was first proposed as a taxonomic grouping by the American zoologist Theodore Gill in 1893 as the superfamily Zoarceoidea. The 5th edition of '' Fishes of the World'' classifies the Zoarcoidei as a suborder within the order Scorpaeniformes. Other authorities classify this taxon as the infraorder Zoarcales wihin the suborder Cottoidei of the Perciformes because removing the Scorpaeniformes from the Perciformes renders that taxon non monophyletic. The monophyly of this grouping has still not been fully ascertained but it is generally accepted that the most basal family is Bathymasteridae. Timeline ImageSize = width:1000px height:auto ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dentition
Dentition pertains to the development of teeth and their arrangement in the mouth. In particular, it is the characteristic arrangement, kind, and number of teeth in a given species at a given age. That is, the number, type, and morpho-physiology (that is, the relationship between the shape and form of the tooth in question and its inferred function) of the teeth of an animal. Animals whose teeth are all of the same type, such as most non-mammalian vertebrates, are said to have '' homodont'' dentition, whereas those whose teeth differ morphologically are said to have '' heterodont'' dentition. The dentition of animals with two successions of teeth (deciduous, permanent) is referred to as '' diphyodont'', while the dentition of animals with only one set of teeth throughout life is ''monophyodont''. The dentition of animals in which the teeth are continuously discarded and replaced throughout life is termed ''polyphyodont''. The dentition of animals in which the teeth are set in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through convergent evolution they have independently evolved external superficial fish-like body plans adapted to their marine environments, including most numerously fish, but also mammals such as cetaceans ( whales, dolphins, and porpoises), and even extinct ancient marine reptiles such as various known species of ichthyosaurs. Most species have only one dorsal fin, but some have two or three. Wildlife biologists often use the distinctive nicks and wear patterns which develop on the dorsal fins of large cetaceans to identify individuals in the field. The bony or cartilaginous bones that support the base of the dorsal fin in fish are called ''pterygiophores''. Functions The main purpose of the dorsal fin is to stabilize the animal against ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eggert Ólafsson
Eggert Ólafsson (1 December 1726 – 30 May 1768) was an Icelandic explorer, writer and conservator of the Icelandic language. He also worked to revive the Icelandic culture and economy. Background He was the son of a farmer from Svefneyjar in Breiðafjörður. He studied natural sciences, Classics, Grammar, Law, and Agriculture at the University of Copenhagen. He obtained a bachelor's degree from the University of Copenhagen. In 1772 he posthumously published ''Reise igiennem Island'' (Travels in Iceland), an account of the scientific and cultural survey he conducted between 1752 and 1757. The book remains a seminal work on Iceland and its people. Eggert wrote on a wide range of topics. His writing has made him known for his pro-conservation stance on the Icelandic language, which has undergone significant change since the 18th century. Eggert was a devout patriot, and his literary works, chiefly his poems, burn with this fervor. He used his writings to stir up patriotism, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Simon Pallas
Peter Simon Pallas FRS FRSE (22 September 1741 – 8 September 1811) was a Prussian zoologist and botanist who worked in Russia between 1767 and 1810. Life and work Peter Simon Pallas was born in Berlin, the son of Professor of Surgery Simon Pallas. He studied with private tutors and took an interest in natural history, later attending the University of Halle and the University of Göttingen. In 1760, he moved to the University of Leiden and passed his doctor's degree at the age of 19. Pallas travelled throughout the Netherlands and to London, improving his medical and surgical knowledge. He then settled at The Hague, and his new system of animal classification was praised by Georges Cuvier. Pallas wrote ''Miscellanea Zoologica'' (1766), which included descriptions of several vertebrates new to science which he had discovered in the Dutch museum collections. A planned voyage to southern Africa and the East Indies fell through when his father recalled him to Berlin. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caudal Fin
Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as seen in sharks. Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping. Most fish use fins when swimming, flying fish use pectoral fins for gliding, and frogfish use them for crawling. Fins can also be used for other purposes; male sharks and mosquitofish use a modified fin to deliver sperm, thresher sharks use their caudal fin to stun prey, reef stonefish have spines in their dorsal fins that inject venom, anglerfish use the first spine of their dorsal fin like a fishing rod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anal Fin
Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as seen in sharks. Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping. Most fish use fins when swimming, flying fish use pectoral fins for gliding, and frogfish use them for crawling. Fins can also be used for other purposes; male sharks and mosquitofish use a modified fin to deliver sperm, thresher sharks use their caudal fin to stun prey, reef stonefish have spines in their dorsal fins that inject venom, anglerfish use the first spine of their dorsal fin like a fishing rod to lu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lateral Line
The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelial cells, known as hair cells, which respond to displacement caused by motion and transduce these signals into electrical impulses via excitatory synapses. Lateral lines serve an important role in schooling behavior, predation, and orientation. Fish can use their lateral line system to follow the vortices produced by fleeing prey. Lateral lines are usually visible as faint lines of pores running lengthwise down each side, from the vicinity of the gill covers to the base of the tail. In some species, the receptive organs of the lateral line have been modified to function as electroreceptors, which are organs used to detect electrical impulses, and as such, these systems remain closely linked. Most amphibian larvae and some fully aquatic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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