''Eremophilus mutisii'' is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

catfish Catfish (or catfishes; order (biology), order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Catfish are common name, named for their prominent barbel (anatomy), barbels, which resemble a cat's whiskers, though not ...

(

order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...

Siluriformes) of the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Trichomycteridae Trichomycteridae is a family of catfishes commonly known as pencil catfishes or parasitic catfishes. This family includes the candiru fish (''Vandellia cirrhosa''), feared by some people for its alleged habit of entering into the urethra of ...

, and the only member of its

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

. This fish grows to about 30 centimetres (12 in) and originates from the

Bogotá River The Bogotá River is a major river of the Cundinamarca Department, Cundinamarca department of Colombia. A right tributary of the Magdalena River, the Bogotá River crosses the region from the northeast to the southwest and passing along the wester ...

basin, which is a tributary of the

Magdalena River The Magdalena River (, ; less commonly ) is the main river of Colombia, flowing northward about through the western half of the country. It takes its name from the biblical figure Mary Magdalene. It is navigable through much of its lower reaches, ...

. It has probably been introduced to

Ubaté Ubaté (originally Villa San Diego de Ubaté) is a town and municipality in the Ubaté Province, part of Cundinamarca Department, Colombia. Ubaté is the capital of the province with the same name and situated in the Ubaté–Chiquinquirá Vall ...

Chiquinquirá Chiquinquirá is a town and municipality in the Colombian Department of Boyacá, part of the subregion of the Western Boyacá Province. Located some 115 km north of Bogotá, Chiquinquirá is situated above sea level and has a yearly aver ...

, and

Tundama Tundama or Saymoso (15th century – late December 1539 in Duitama) was a ''cacique'' of the Muisca Confederation, a loose confederation of different rulers of the Muisca who inhabited the central highlands (Altiplano Cundiboyacense) of the Co ...

valleys,

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

. ''E. mutisii'' uses the vascularized central portion of its stomach for aerial

respiration Respiration may refer to: Biology * Cellular respiration, the process in which nutrients are converted into useful energy in a cell ** Anaerobic respiration, cellular respiration without oxygen ** Maintenance respiration, the amount of cellul ...

. Air ventilation takes place during a rapid dash to the surface with the expiration of old air preceding inspiration. Air-breathing occurs in

hypoxic Hypoxia means a lower than normal level of oxygen, and may refer to: Reduced or insufficient oxygen * Hypoxia (environmental), abnormally low oxygen content of a specific environment ** Hypoxia in fish, responses of fish to hypoxia * Hypoxia (medi ...

and normoxic water, but is not obligatory. The evolution of a reduced

swimbladder The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ in bony fish that functions to modulate buoyancy, and thus allowing the fish to stay at desired water depth without having to maintain lift via swimming, w ...

is associated with a

benthic The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from the Ancient Greek word (), meaning "the depths". ...

mode of life in ''E. mutisii''. This fish species is an excellent food fish. It is the only species of food fish which has been able to survive competition from introduced

trout Trout (: trout) is a generic common name for numerous species of carnivorous freshwater ray-finned fishes belonging to the genera '' Oncorhynchus'', ''Salmo'' and ''Salvelinus'', all of which are members of the subfamily Salmoninae in the ...

and

carp The term carp (: carp) is a generic common name for numerous species of freshwater fish from the family (biology), family Cyprinidae, a very large clade of ray-finned fish mostly native to Eurasia. While carp are prized game fish, quarries and a ...

species into the region.

References

Trichomycteridae Monotypic fish genera Endemic fauna of Colombia Freshwater fish of Colombia Fish of the Andes Bogotá River Taxa named by Alexander von Humboldt {{Trichomycteridae-stub