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Sea Raven
The Hemitripterinae is a subfamily of the scorpaeniform family Agonidae, known as sea ravens or sailfin sculpins. They are bottom-dwelling fish that feed on small invertebrates, found in the northwest Atlantic and north Pacific Oceans. They are covered in small spines (modified scales). Taxonomy The sea raven subfamily Hemitripterinae, was first proposed as a taxonomic grouping in 1872 by the American biologist Theodore Gill. It has been treated as a family, the Hemitripteridae, within the Cottoidea superfamily but phylogentic analyses in the 21st Century place the grouping within the family Agonidae. Genera The following three genera are classified within the subfamily Hemitripterinae: Characteristics Hemitripterinae species are called sea ravens because early zoologists posited that their large pectoral fins may be used to fly in the air. Another name is sailfin sculpins, referring to their tall dorsal fins, in particular the very tall first dorsal fin of '' Nautichthys o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silverspotted Sculpin
''Blepsias cirrhosus'', the silverspotted sculpin, is a species of sculpin belonging to the subfamily Hemitripterinae of the family Agonidae. This species is found the northern Pacific Ocean from the Sea of Japan and Alaska to San Miguel Island off southern California. Taxonomy ''Blepsias cirrhosus'' was first formally described as ''Trachinus cirrhosus'' by the German naturalist Peter Simon Pallas with they type locality given as "America; port of Avacha, southeastern Kamchatka; Penzhinskaya Bay, Okhotsk Sea". In 1829 Georges Cuvier proposed the monospecific genus '' Blepsias'' for ''T. cirrhosus'' so it is the type species of that genus. The specific name ''cirrhosus'' means "curled" or "bearing tendrils", an allusion to the elongated, whiskery barbels on the snout and chin. Description ''Blepsias cirrhosus'' has a deep, compressed body which is covered in papillae which enclose a small spine that is embedded in a bony plate in the skin. There are cirrhi on the chin. The f ... [...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] |
Hemitripterinae
The Hemitripterinae is a subfamily of the scorpaeniform family Agonidae, known as sea ravens or sailfin sculpins. They are bottom-dwelling fish that feed on small invertebrates, found in the northwest Atlantic and north Pacific Oceans. They are covered in small spines (modified scales). Taxonomy The sea raven subfamily Hemitripterinae, was first proposed as a taxonomic grouping in 1872 by the American biologist Theodore Gill. It has been treated as a family, the Hemitripteridae, within the Cottoidea superfamily but phylogentic analyses in the 21st Century place the grouping within the family Agonidae. Genera The following three genera are classified within the subfamily Hemitripterinae: Characteristics Hemitripterinae species are called sea ravens because early zoologists posited that their large pectoral fins may be used to fly in the air. Another name is sailfin sculpins, referring to their tall dorsal fins, in particular the very tall first dorsal fin of '' Nautichthys o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intertidal Zone
The intertidal zone or foreshore is the area above water level at low tide and underwater at high tide; in other words, it is the part of the littoral zone within the tidal range. This area can include several types of habitats with various species of life, such as sea stars, sea urchins, and many species of coral with regional differences in biodiversity. Sometimes it is referred to as the ''littoral zone'' or '' seashore'', although those can be defined as a wider region. The intertidal zone also includes steep rocky cliffs, sandy beaches, bogs or wetlands (e.g., vast mudflats). This area can be a narrow strip, such as in Pacific islands that have only a narrow tidal range, or can include many meters of shoreline where shallow beach slopes interact with high tidal excursion. The peritidal zone is similar but somewhat wider, extending from above the highest tide level to below the lowest. Organisms in the intertidal zone are well-adapted to their environment, facing high ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demersal Fish
Demersal fish, also known as groundfish, live and feed on or near the bottom of seas or lakes (the demersal zone).Walrond Carl . "Coastal fish - Fish of the open sea floor"Te Ara - the Encyclopedia of New Zealand. Updated 2 March 2009 They occupy the sea floors and lake beds, which usually consist of mud, sand, gravel or rocks. In coastal waters, they are found on or near the continental shelf, and in deep waters, they are found on or near the continental slope or along the continental rise. They are not generally found in the deepest waters, such as abyssal depths or on the abyssal plain, but they can be found around seamounts and islands. The word ''demersal'' comes from the Latin ''demergere'', which means ''to sink''. Demersal fish are bottom feeders. They can be contrasted with pelagic fish, which live and feed away from the bottom in the open water column. Demersal fish fillets contain little fish oil (one to four per cent), whereas pelagic fish can contain up to 30 p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemitripterus Americanus
''Hemitripterus americanus'', the sea raven, is a species of marine ray-finned fish belonging to the subfamily Hemitripterinae of the Family (biology), family Agonidae. The sea raven is found along the Atlantic coast of North America. Taxonomy ''Hemitripterus americanus'' was first formally Species description, described as ''Scorpaena americana'' in 1789 by the German naturalist Johann Friedrich Gmelin with its Type locality (biology), type locality given as "America". In 1801 Marcus Elieser Bloch and Johann Gottlob Theaenus Schneider described a new species ''Cottus tripterygius'' and in 1829 Georges Cuvier proposed the new Monotypic taxon, monotypic genus ''Hemitripterus'' for ''C. tripterygius'' which was later shown to be a junior synonym of Gmelin's ''S. americana''. The genus ''Hemitripterus'' is classified within the subfamily Hemtripterinae of the family Agonidae. Description ''Hemitripterus americanus'' are variable in color from blood red to reddish purple to yellow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bigmouth Sculpin
The bigmouth sculpin (''Hemitripterus bolini'') is a species of marine ray-finned fish belonging to the subfamily Hemitripterinae of the family Agonidae. This species is found in the northern Pacific Ocean from the Bering Sea and the Aleutian Islands south as far as Eureka, California Eureka ( ; Wiyot: ; Hupa: ; ) is a city and the county seat of Humboldt County, located on the North Coast of California. The city is located on U.S. Route 101 on the shores of Humboldt Bay, north of San Francisco and south of the Oreg .... References {{Taxonbar, from=Q2750639 Fish described in 1934 Bigmouth sculpin Taxa named by George S. Myers ... [...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] |
Pectoral Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish aquatic locomotion, swim. Apart from the tail or caudal fin, fish fins have no direct connection with the vertebral column, 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 bone, bony spine (zoology), spines or ray (fish fin anatomy), rays covered by a thin stretch of fish scale, scaleless skin; in lobe-finned fish (Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central limb bud, bud supported by appendicular skeleton, jointed bones; in cartilaginous fish (Chondrichthyes) and jawless fish (Agnatha), fins are fleshy "flipper (anatomy), flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are ... [...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] |
Preoperculum
This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes. A B C D E F G H I J K L M N O P R S T U V W References Further reading * {{Cite book , last1=Moyle , first1=Peter , url=https://books.google.com/books?id=sZYWAQAAIAAJ , title=Fishes: An Introduction to Ichthyology , last2=C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
