|
Channichthys
''Channichthys'' is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. They are native to the Southern Ocean. Taxonomy ''Channichthys'' was first formally described as a genus in 1844 by the Scottish naval surgeon, naturalist and Arctic explorer John Richardson when he described the unicorn icefish (''Channichthys rhinoceratus'') which he placed in a new monotypic genus. Subsequently up to nine species have been classified within ''Channichthys'' which is what FishBase does while ''Catalog of Fishes'' recognises 5 species while other authorities are of the view that the genus is monotypic and that ''C. rhinoceratus'' is the only species. The genus name is a compound of ''channos'' meaning "gape" and ''ichthys'' which means "fish", alluding to the wide gape of these fishes. Species The species of this genus are quite similar to each other, and reliable ways of distinguishing them include the shape of their dorsal fins, gill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthys Aelitae
''Channichthys'' is a genus of marine Actinopterygii, ray-finned fish belonging to the Family (biology), family Channichthyidae, the crocodile icefishes. They are native to the Southern Ocean. Taxonomy ''Channichthys'' was first formally described as a genus in 1844 by the Scottish people, Scottish naval surgeon, naturalist and Arctic explorer John Richardson (naturalist), John Richardson when he Species description, described the unicorn icefish (''Channichthys rhinoceratus'') which he placed in a new Monotypic taxon, monotypic genus. Subsequently up to nine species have been classified within ''Channichthys'' which is what FishBase does while ''Catalog of Fishes'' recognises 5 species while other authorities are of the view that the genus is monotypic and that ''C. rhinoceratus'' is the only species. The genus name is a compound of ''channos'' meaning "gape" and ''ichthys'' which means "fish", alluding to the wide gape of these fishes. Species The species of this genus are q ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthys Rugosus
''Channichthys'' is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. They are native to the Southern Ocean. Taxonomy ''Channichthys'' was first formally described as a genus in 1844 by the Scottish naval surgeon, naturalist and Arctic explorer John Richardson when he described the unicorn icefish (''Channichthys rhinoceratus'') which he placed in a new monotypic genus. Subsequently up to nine species have been classified within ''Channichthys'' which is what FishBase does while '' Catalog of Fishes'' recognises 5 species while other authorities are of the view that the genus is monotypic and that ''C. rhinoceratus'' is the only species. The genus name is a compound of ''channos'' meaning "gape" and ''ichthys'' which means "fish", alluding to the wide gape of these fishes. Species The species of this genus are quite similar to each other, and reliable ways of distinguishing them include the shape of their dorsal fins, gill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthys Bospori
''Channichthys'' is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. They are native to the Southern Ocean. Taxonomy ''Channichthys'' was first formally described as a genus in 1844 by the Scottish naval surgeon, naturalist and Arctic explorer John Richardson when he described the unicorn icefish (''Channichthys rhinoceratus'') which he placed in a new monotypic genus. Subsequently up to nine species have been classified within ''Channichthys'' which is what FishBase does while '' Catalog of Fishes'' recognises 5 species while other authorities are of the view that the genus is monotypic and that ''C. rhinoceratus'' is the only species. The genus name is a compound of ''channos'' meaning "gape" and ''ichthys'' which means "fish", alluding to the wide gape of these fishes. Species The species of this genus are quite similar to each other, and reliable ways of distinguishing them include the shape of their dorsal fins, gill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthys Rhinoceratus
''Channichthys rhinoceratus,'' the unicorn icefish, is a species of marine ray-finned fish belonging to the Family (biology), family Channichthyidae, the crocodile icefishes. It is Endemism, endemic to the Kerguelen Plateau, Kerguelen-Heard Plateau in the Southern Ocean. It is a Demersal fish, demersal species living from Pelagic zone, surface waters to depths up to . It is considered by some researchers as the only species in the genus ''Channichthys.'' Description Described by John Richardson (naturalist), Sir John Richardson in 1844 and being the type species of the genus ''Channichthys'', the unicorn icefish is generally pale brown, though smaller specimens have four dark cross-bars present on each side of the body, and dark spots are present on the body, sometimes with reddish patches and dark reticulations are present. Dark spots may be present on the blackish first dorsal fin. Other fins are colored pale or dusky. It grows up to a maximum length of 60 cm (24 inches) and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthys Irinae
''Channichthys irinae,'' the pygmy icefish, is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is endemic to the Kerguelen Islands in the Southern Ocean. Taxonomy ''Channichthys irinae'' was first formally described in 1995 by the Ukrainian based ichthyologist Gennadiy A. Shandikov with the type locality given as the southwestern Indian Ocean, northeast of Kerguelen Island. Fishbase treats it as a valid species but '' Catalog of Fishes'' treats it as a junior synonym of '' C. panticapaei''. Description ''Channichthys irinae'' grows to a maximum length of . This species is very similar to '' Channichthys mithridatis'' (to which it is closely related), but it has more gill rakers in more and longer rows (21 to 30 in two rows for ''C. irinae'' compared to 11 to 16 in one row for ''C. mithraditis''). Distinguishing factors from other ''Channichthys'' species also include the fact that it has the largest eye diameter relativ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthys Mithridatis
''Channichthys mithridatis'', the green icefish, is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is endemic to the Kerguelen Islands in the Southern Ocean. Taxonomy ''Channichthys mithridatis'' was first formally described in 2008 by Gennadiy A. Shandikov with the type locality given as Kerguelen Island. Fishbase treats ''C. mithridatis'' as a valid species but '' Catalog of Fishes'' treats it as a junior synonym of '' C. rhinoceratus''. The specific name ''mithridatis'' is a Latinisation of Mithridates, the King of Pontus in the Hellenistic period who ruled over Panticapaeum, the modern city of Kerch in the Crimea where the institute yugNIRO which staudied Antractic fisheries was based. Description ''Channichthys mithridatis'' attains a maximum total length of . The first dorsal fin has spines and there are 32-34 dorsal fin rays while the anal fin contains 30-32 soft rays. The overall colour of the body and head v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthys Richardsoni
''Channichthys richardsoni'', the robust icefish, is a demersal species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is endemic to the shelf waters of the Kerguelen Islands in the Southern Ocean. It lives at depths of . Taxonomy The species name is given in honour of the Scottish naturalist John Richardson, who described the first species of icefish ''Channichthys rhinoceratus,'' and established the genus ''Channichthys''. Fishbase treats it as a valid species but '' Catalog of Fishes'' treats it as a junior synonym of '' C. rhinoceratus''. Description This heavy-bodied species is dark grey to brown in coloration and has 3-4 dark cross bars on its body. There are up to 6 narrow dark stripes on the caudal fins and pelvic fins. Dark spots and blotches are present on the ventral part of body and head. The lower jaw extends to about one-third to half of the eye diameter below the eye. It is distinguished from other ''Channichthys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthys Panticapaei
''Channichthys panticapaei'', the charcoal icefish, is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is endemic to the Kerguelen Islands area in the Southern Ocean. This demersal species is found at depths of and is sometimes caught in bottom trawls. However, it is not targeted and is of no interest to commercial fisheries at present. It is dark gray to uniformly blackish with long first to third dorsal fin spines. The charcoal icefish reaches lengths of up to , with females generally being smaller (maximum length being ). This planktivorous (plankton-eating) species likely spawns Spawn is the eggs and sperm released or deposited into water by aquatic animals. As a verb, ''to spawn'' refers to the process of releasing the eggs and sperm, and the act of both sexes is called spawning. Most aquatic animals, except for aquat ... from June to July, with maturity reached at 30 cm (11.8 inches) TL / 27 cm (10.6 inches) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthys Velifer
''Channichthys velifer'', or the sail icefish, is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is endemic to the Kerguelen Plateau area of the Southern Ocean. This demersal species lives at depths of 125 to 150 m (410 to 492 ft). It is described to have a light brownish-olive or grayish-olive color, with a white belly and dark spots on the caudal and dorsal fins forming brush-like patterns. The anal fins are whitish and dark brown spots are sometimes present. Preservation in formalin results in a reddish color. The granulation is moderate, and is better expressed in larger specimens. The dorsal fin membranes are high and there is a large number of dorsal fin rays, distinguishing it from similar ''Channichthys'' species (e.g. ''Channichthys rugosus''). Furthermore, ''C.velifer'' has more pectoral fin rays than ''C.rugosus''. This species feeds on fishes and cephalopods and is of no interest to commercial fisheries ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channichthyidae
The crocodile icefish or white-blooded fish comprise a family (Channichthyidae) of notothenioid fish found in the Southern Ocean around Antarctica. They are the only known vertebrates to lack hemoglobin in their blood as adults. Icefish populations are known to reside in the Atlantic and Indian sectors of the Southern Ocean, as well as the continental shelf waters surrounding Antarctica. Water temperatures in these regions remain relatively stable, generally ranging from . One icefish, ''Champsocephalus esox,'' is distributed north of the Antarctic Polar Frontal Zone. At least 16 species of crocodile icefish are currently recognized, although eight additional species have been proposed for the icefish genus ''Channichthys.'' In February 2021, scientists discovered and documented a breeding colony of ''Neopagetopsis ionah'' icefish estimated to have 60 million active nests across an area of approximately 92 square miles at the bottom of the Weddell Sea in Antarctica. The majority ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crocodile Icefish
The crocodile icefish or white-blooded fish comprise a family (Channichthyidae) of notothenioid fish found in the Southern Ocean around Antarctica. They are the only known vertebrates to lack hemoglobin in their blood as adults. Icefish populations are known to reside in the Atlantic and Indian sectors of the Southern Ocean, as well as the continental shelf waters surrounding Antarctica. Water temperatures in these regions remain relatively stable, generally ranging from . One icefish, ''Champsocephalus esox,'' is distributed north of the Antarctic Polar Frontal Zone. At least 16 species of crocodile icefish are currently recognized, although eight additional species have been proposed for the icefish genus ''Channichthys.'' In February 2021, scientists discovered and documented a breeding colony of ''Neopagetopsis ionah'' icefish estimated to have 60 million active nests across an area of approximately 92 square miles at the bottom of the Weddell Sea in Antarctica. The majority ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operculum (fish)
The operculum is a series of bones found in bony fish and chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding. Anatomy The opercular series contains four bone segments known as the preoperculum, suboperculum, interoperculum and operculum. The preoperculum is a crescent-shaped structure that has a series of ridges directed posterodorsally to the organisms canal pores. The preoperculum can be located through an exposed condyle that is present immediately under its ventral margin; it also borders the operculum, suboperculum, and interoperculum posteriorly. The suboperculum is rectangular in shape in most bony fishy and is located ventral to the preoperculum and operculum components. It is the thinnest bone segment out of the opercular series and is located directly above the gills. The interoperculum is triangular shaped and borders the suboperculum posterodorsally and the preoperculum anterodorsa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
