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Pleurogrammus
''Pleurogrammus'' is a genus of ray-finned fishes belonging to the Family (biology), family Hexagrammidae, the greenlings, known as Atka mackerels. These fishes are found in the northwestern Pacific Ocean. Taxonomy ''Pleurogrammus'' was first proposed as a genus in 1861 by the American biologist Theodore Gill with ''Labrax monopterygius'', which had been Species description, described in 1810 by Peter Simon Pallas, as its type species. The genus was placed in the monogeneric subfamily Pleurogramminae within the family Hexagrammidae by E. P. Rutenberg in 1954. Etymology ''Pleurogrammus'' is a compound of ''pleuro'', which means "side", and ''grammus'', meaning "line", a reference to the five lateral line canals on each flank. Species The currently recognized species in this genus are: Characteristics ''Pleurogrammus'' species have no incision in the dorsal fin, or, if present, the incision is not deep. The caudal fin is forked and there are 5 lateral lines on each flankl. The u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurogrammus Azonus 2
''Pleurogrammus'' is a genus of ray-finned fishes belonging to the family Hexagrammidae, the greenlings, known as Atka mackerels. These fishes are found in the northwestern Pacific Ocean. Taxonomy ''Pleurogrammus'' was first proposed as a genus in 1861 by the American biologist Theodore Gill with ''Labrax monopterygius'', which had been described in 1810 by Peter Simon Pallas, as its type species. The genus was placed in the monogeneric subfamily Pleurogramminae within the family Hexagrammidae by E. P. Rutenberg in 1954. Etymology ''Pleurogrammus'' is a compound of ''pleuro'', which means "side", and ''grammus'', meaning "line", a reference to the five lateral line canals on each flank. Species The currently recognized species in this genus are: Characteristics ''Pleurogrammus'' species have no incision in the dorsal fin, or, if present, the incision is not deep. The caudal fin is forked and there are 5 lateral lines on each flankl. The upper surface of the skull is strongly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurogrammus Azonus
The Okhotsk Atka mackerel (''Pleurogrammus azonus''), also known as the Arabesque greenling, is a mackerel-like species in the family Hexagrammidae. It is commonly known as ''hokke'' (法華) in Japan and ''imyeonsu'' in Korean. The primary population of the fish is found off the Sea of Okhotsk. History According to legend, it was discovered by the monk Nichiji. Distribution and habitat The Okhotsk Atka mackerel is found in the northwest Pacific Ocean occurring in Primorskii Krai in Russia, the Sea of Okhotsk east to the Kuril Islands south to Ibaraki Prefecture and Tsushima in Japan and the Yellow Sea. It is an oceanodromous, demersal fish found at depths from the surface to . Taxonomy The Okhotsk atka mackerel was first formally described in 1913 by the American ichthyologists David Starr Jordan and Charles William Metz with its type locality given as Nampo in North Korea. This species is occasionally considered synonymous with the Atka mackerel, ''P. monopterygius'' ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurogrammus Monopterygius
The Atka mackerel (''Pleurogrammus monopterygius'') is a mackerel in the family Hexagrammidae. Atka mackerel are common in the northern Pacific Ocean, and are one of only two members of the genus ''Pleurogrammus'' – the other being the Arabesque greenling (''Pleurogrammus azonus''). The Atka mackerel was named for Atka Island (''Atx̂ax̂'' in Aleut), the largest island of the Andreanof islands, a branch of the Aleutians. Taxonomy The Atka mackerel was originally described under the genus ''Labrax'', but has since been moved to ''Pleurogrammus''. Both names are attributed to Peter Simon Pallas, who published his description of the fish in 1810, roughly a year before his death.*Mearns, Barbara and Richard – ''Biographies for Birdwatchers'' Atka mackerel were once considered to be synonymous with Arabesque greenlings.Nelson, J.S., 1994. ''Fishes of the World''. Wiley, New York. The combined species would have been called the Okhotsk Atka mackerel, a name now used only for the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexagrammidae
Hexagrammidae, the greenlings, is a Family (biology), family of marine ray-finned fishes belonging to the suborder Cottoidei in the Order (biology), order Perciformes. These fishes are found in the North Pacific Ocean. Taxonomy Hexagrammidae was first proposed as a family in 1888 by the American ichthyologist David Starr Jordan. The 5th edition of ''Fishes of the World'' classifies this family as the only family in the Monotypic taxon, monotypic Superfamily (biology), superfamily Hexagrammoidea within the suborder Cottoidei of the diverse order Scorpaeniformes. Other workers have found that if the Scorpaeniformes, as delimited in ''Fishes of the World'', is not included in the Perciformes it renders the Perciformes paraphyletic. These workers retain the Cottoidei as a suborder within the Perciformes while reclassifying Hexagrammoidea as the infraorder Hexagrammales. The family Zaniolepididae has been included within the Hexagrammidae, as the subfamilies Zaniolepidinae and Oxylebi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagic Fish
Pelagic fish live in the pelagic zone of ocean or lake waters—being neither close to the bottom nor near the shore—in contrast with demersal fish that live on or near the bottom, and reef fish that are associated with coral reefs. The marine pelagic environment is the largest aquatic habitat on Earth, occupying 1,370 million cubic kilometres (330 million cubic miles), and is the habitat for 11% of known fish species. The oceans have a mean depth of . About 98% of the total water volume is below , and 75% is below . Moyle and Cech, p. 585 Marine pelagic fish can be divided into coastal (inshore) fish and oceanic (offshore) fish. Coastal pelagic fish inhabit the relatively shallow and sunlit waters above the continental shelf, while oceanic pelagic fish inhabit the vast and deep waters beyond the continental shelf (even though they also may swim inshore). Pelagic fish range in size from small coastal forage fish, such as herrings and sardines, to large apex pred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Total Length
Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the hypural plate. This measurement excludes the length of the caudal (tail) fin. Total length (TL) is the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body. Standard length measurements are used with Teleostei (most bony fish), while total length measurements are used with Myxini (hagfish), Petromyzontiformes ( lampreys) and usually Elasmobranchii (shark Sharks are a group of elasmobranch cartilaginous fish characterized by a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anal Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish ( Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish ( Chondrichthyes) and jawless fish ( Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William N
William is a masculine given name of Germanic origin. It became popular in England after the Norman conquest in 1066,All Things William"Meaning & Origin of the Name"/ref> and remained so throughout the Middle Ages and into the modern era. It is sometimes abbreviated "Wm." Shortened familiar versions in English include Will or Wil, Wills, Willy, Willie, Bill, Billie, and Billy. A common Irish form is Liam. Scottish diminutives include Wull, Willie or Wullie (as in Oor Wullie). Female forms include Willa, Willemina, Wilma and Wilhelmina. Etymology William is related to the German given name ''Wilhelm''. Both ultimately descend from Proto-Germanic ''*Wiljahelmaz'', with a direct cognate also in the Old Norse name ''Vilhjalmr'' and a West Germanic borrowing into Medieval Latin ''Willelmus''. The Proto-Germanic name is a compound of *''wiljô'' "will, wish, desire" and *''helmaz'' "helm, helmet".Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caudal Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish (Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish (Chondrichthyes) and jawless fish (Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are predominan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found in most fish, in mammals such as whales, and in extinct ancient marine reptiles such as ichthyosaurs. Most 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 whales to identify individuals in the field. The bones or cartilages that support the dorsal fin in fish are called pterygiophores. Functions The main purpose of the dorsal fin is usually to stabilize the animal against rolling and to assist in sudden turns. Some species have further adapted their dorsal fins to other uses. The sunfish uses the dorsal fin (and the anal fin Fins are moving appendages protruding from the body of fish that interact with water to ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
