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Vandellia
''Vandellia'' is a genus of catfishes native to South America. The species in this genus are the most well-known of the parasitic catfishes also known as candiru, known for their alleged habit of entering the human urethra. Species There are currently three recognized species in this genus: * '' Vandellia beccarii'' di Caporiacco, 1935 * '' Vandellia cirrhosa'' Valenciennes, 1846 (Candiru) * '' Vandellia sanguinea'' Eigenmann, 1917 Distribution ''V. beccarii'' originates from the Orinoco River basin and rivers of The Guianas. ''V. cirrhosa'' is distributed in the Amazon Basin. ''V. sanguinea'' inhabits the Amazon, Orinoco, and Essequibo River basins. Description ''V. beccarii'' can be distinguished from other vandelliines by its square or slightly emarginate caudal fin and the colour pattern of two dark bands extending from the dorsal fin and the anal fin and converging onto the caudal fin. ''V. sanguinea'' may grow to 5.3 centimetres (2.1 in) SL. ''V. cirrhosa'' g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vandellia Cirrhosa
Candiru (''Vandellia cirrhosa''), also known as cañero, toothpick fish, or vampire fish, is a species of parasitic freshwater catfish in the family Trichomycteridae native to the Amazon Basin where it is found in the countries of Bolivia, Brazil, Colombia, Ecuador, and Peru. The definition of ''candiru'' differs between authors. The word has been used to refer to only ''Vandellia cirrhosa'', the entire genus ''Vandellia'', the subfamily Vandelliinae, or even the two subfamilies Vandelliinae and Stegophilinae. Although some candiru species have been known to grow to a size of in length, others are considerably smaller. These smaller species are known for an alleged tendency to invade and parasitise the human urethra; however, despite ethnological reports dating back to the late 19th century, the first documented case of the removal of a candiru from a human urethra did not occur until 1997, and even that incident has remained a matter of controversy. Description Candiru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Candiru (fish)
Candiru (''Vandellia cirrhosa''), also known as cañero, toothpick fish, or vampire fish, is a species of parasitic freshwater catfish in the family Trichomycteridae native to the Amazon Basin where it is found in the countries of Bolivia, Brazil, Colombia, Ecuador, and Peru. The definition of ''candiru'' differs between authors. The word has been used to refer to only ''Vandellia cirrhosa'', the entire genus '' Vandellia'', the subfamily Vandelliinae, or even the two subfamilies Vandelliinae and Stegophilinae. Although some candiru species have been known to grow to a size of in length, others are considerably smaller. These smaller species are known for an alleged tendency to invade and parasitise the human urethra; however, despite ethnological reports dating back to the late 19th century, the first documented case of the removal of a candiru from a human urethra did not occur until 1997, and even that incident has remained a matter of controversy. Description Candirus are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vandellia Beccarii
''Vandellia'' is a genus of catfishes native to South America. The species in this genus are the most well-known of the parasitic catfishes also known as candiru, known for their alleged habit of entering the human urethra. Species There are currently three recognized species in this genus: * '' Vandellia beccarii'' di Caporiacco, 1935 * ''Vandellia cirrhosa'' Valenciennes, 1846 (Candiru) * ''Vandellia sanguinea'' Eigenmann, 1917 Distribution ''V. beccarii'' originates from the Orinoco River basin and rivers of The Guianas. ''V. cirrhosa'' is distributed in the Amazon Basin. ''V. sanguinea'' inhabits the Amazon, Orinoco, and Essequibo River basins. Description ''V. beccarii'' can be distinguished from other vandelliines by its square or slightly emarginate caudal fin and the colour pattern of two dark bands extending from the dorsal fin and the anal fin and converging onto the caudal fin. ''V. sanguinea'' may grow to 5.3 centimetres (2.1 in) SL. ''V. ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vandellia Sanguinea
''Vandellia'' is a genus of catfishes native to South America. The species in this genus are the most well-known of the parasitic catfishes also known as candiru, known for their alleged habit of entering the human urethra. Species There are currently three recognized species in this genus: * '' Vandellia beccarii'' di Caporiacco, 1935 * '' Vandellia cirrhosa'' Valenciennes, 1846 (Candiru) * '' Vandellia sanguinea'' Eigenmann, 1917 Distribution ''V. beccarii'' originates from the Orinoco River basin and rivers of The Guianas. ''V. cirrhosa'' is distributed in the Amazon Basin. ''V. sanguinea'' inhabits the Amazon, Orinoco, and Essequibo River basins. Description ''V. beccarii'' can be distinguished from other vandelliines by its square or slightly emarginate caudal fin and the colour pattern of two dark bands extending from the dorsal fin and the anal fin and converging onto the caudal fin. ''V. sanguinea'' may grow to 5.3 centimetres (2.1 in) SL. ''V. cirrhosa'' g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vandelliinae
The Vandelliinae are a subfamily of catfishes (order Siluriformes) of the family Trichomycteridae. Vandelliines are hematophagous, feeding on the blood of larger fish. Members of this subfamily may be known as candirú, notorious for occasionally entering human bodily orifices, particularly the urethra The urethra (from Greek οὐρήθρα – ''ourḗthrā'') is a tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body of both females and males. In human females and other primates, the urethra c ...; no evidence indicates such attacks are anything more than rare and accidental perversions of the usual feeding behaviour of the parasite — it seems unlikely that it would survive in the human body for long, so such an entry should be disastrous for both parties. In the usual course of events, parasitic vandelliines enter the body cavities of host fishes, feed on blood from gill filaments, and leave again. Vandelliines usually par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catfish
Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, the Mekong giant catfish from Southeast Asia, the wels catfish of Eurasia, and the piraíba of South America, to detritivores (species that eat dead material on the bottom), and even to a tiny parasitic species commonly called the candiru, ''Vandellia cirrhosa''. Neither the armour-plated types nor the naked types have scales. Despite their name, not all catfish have prominent barbels or "whiskers". Members of the Siluriformes order are defined by features of the skull and swimbladder. Catfish are of considerable commercial importance; many of the larger species are farmed or fished for food. Many of the smaller species, particularly the genus ''Corydoras'', are important in the aquarium hobby. Many catfish are nocturnal, [...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 rollin ... [...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] |
Centimetre
330px, Different lengths as in respect to the Electromagnetic spectrum, measured by the Metre and its deriveds scales. The Microwave are in-between 1 meter to 1 millimeter. A centimetre (international spelling) or centimeter (American spelling) (SI symbol cm) is a Units of measurement, unit of length in the International System of Units (SI), equal to one hundredth of a metre, ''centi'' being the SI prefix for a factor of . The centimetre was the base unit of length in the now deprecated centimetre–gram–second (CGS) system of units. Though for many physical quantities, SI prefixes for factors of 103—like ''milli-'' and ''kilo-''—are often preferred by technicians, the centimetre remains a practical unit of length for many everyday measurements. A centimetre is approximately the width of the fingernail of an average adult person. Equivalence to other units of length : One millilitre is defined as one cubic centimetre, under the SI system of units. Other uses In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inch
Measuring tape with inches The inch (symbol: in or ″) is a unit of length in the British imperial and the United States customary systems of measurement. It is equal to yard or of a foot. Derived from the Roman uncia ("twelfth"), the word ''inch'' is also sometimes used to translate similar units in other measurement systems, usually understood as deriving from the width of the human thumb. Standards for the exact length of an inch have varied in the past, but since the adoption of the international yard during the 1950s and 1960s the inch has been based on the metric system and defined as exactly 25.4 mm. Name The English word "inch" ( ang, ynce) was an early borrowing from Latin ' ("one-twelfth; Roman inch; Roman ounce"). The vowel change from Latin to Old English (which became Modern English ) is known as umlaut. The consonant change from the Latin (spelled ''c'') to English is palatalisation. Both were features of Old English phonology; see and fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achille Valenciennes
Achille Valenciennes (9 August 1794 – 13 April 1865) was a French zoologist. Valenciennes was born in Paris, and studied under Georges Cuvier. His study of parasitic worms in humans made an important contribution to the study of parasitology. He also carried out diverse systematic classifications, linking fossil and current species. He worked with Cuvier on the 22-volume "'' Histoire Naturelle des Poissons''" (Natural History of Fish) (1828–1848), carrying on alone after Cuvier died in 1832. In 1832, he succeeded Henri Marie Ducrotay de Blainville (1777–1850) as chair of ''Histoire naturelle des mollusques, des vers et des zoophytes'' at the Muséum national d'histoire naturelle. Early in his career, he was given the task of classifying animals described by Alexander von Humboldt (1769–1859) during his travels in the American tropics (1799 to 1803), and a lasting friendship was established between the two men. He is the binomial authority for many species of fish, such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Measurement
Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries 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. Simply put, 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 (sharks and rays), as well as some other fishes. Total length meas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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