Depending on the exact population, cave forms can have degenerated sight or have total loss of sight and even their eyes. Stanford University Press, Stanford, CA. The Mexican tetra, or Mexican cave fish, scientific name Astyanax mexicanus, is a fish having many names. 23.3-25.6°C (74 … (1980 et seq.) [27], Inhibition of the HSP90 protein has a dramatic effect in the development of the blind tetra. Pages 1990). Many caves are known to have blind fish in subterranean bodies of water. [5][20], Another cave-adapted population of Astyanax, varying from blind and depigmented to individuals showing intermediate features, is known from the Granadas Cave, part of the Balsas River drainage in Guerrero, southern Mexico, but it is a part of A. aeneus (itself sometimes included in A. "Blind cave fish" redirects here. [7], The eyed and eyeless forms of A. mexicanus, being members of the same species, are closely related and can interbreed[18] making this species an excellent model organism for examining convergent and parallel evolution, regressive evolution in cave animals, and the genetic basis of regressive traits. By the time that an animal had reached, after numberless generations, the deepest recesses, disuse will on this view have more or less perfectly obliterated its eyes, and natural selection will often have effected other changes, such as an increase in the length of antennae or palpi, as compensation for blindness. The teleost Astyanax mexicanus consists of an eyed epigean form (surface fish) and at least 29 different populations of eyeless hypogean forms (cavefish). and R. N. Fisher. Among some creationists, the cave tetra is seen as evidence 'against' evolution. Oklahoma State University Press, Stillwater, OK. Miller, Changes in the known Oklahoma fish Previously established in southern Oklahoma; the species has not been However sunlight does have minimal impact on the "body clock" in caves. Proceedings of the Oklahoma Academy of Science 33(1952):141. [25], Darwin said of sightless fish:.mw-parser-output .templatequote{overflow:hidden;margin:1em 0;padding:0 40px}.mw-parser-output .templatequote .templatequotecite{line-height:1.5em;text-align:left;padding-left:1.6em;margin-top:0}. ), A. mexicanus more likely represents a species complex (Mayden et al. these likely represented native records and not introductions). 393 pp. Survival and abundance of introduced fishes near San Antonio, Texas. l'Astyanax mexicanus est un tétra originaire des régions subtropicales et tempérées de l'Amérique du Nord, centrale et orientale.On le rencontre principalement au Mexique, au Texas et au Nouveau Mexique. [16] Studies suggest at least two distinct genetic lineages occur among the blind populations, and the current distribution of populations arose by at least five independent invasions. Fishes of Arizona. Cave fish and surface fish are able to produce fertile offspring. Evans, W. A., and P. A. Douglas. Conner, J. V., and R. D. Suttkus. American freshwater fishes. Mexico, and in the associated nearby border area of Texas, to be One argument claims this is an instance of "devolution"—showing an evolutionary trend of decreasing complexity. Fishes occurring in Lake Bistineau, Louisiana. [18] In addition to regressive traits, cave forms evolved "constructive traits". Atlas of North American freshwater 1958. 1980 et seq. É um membro da família Characidae (que pode atingir os 12 cm de comprimento, embora valores à volta dos 9 cm sejam mais comuns) e tal como todos os outros membros da família, é um depositor de ovos. Reported from Arizona, California, and Louisiana. (1990) and Page and Burr (1991) gave distinguishing characteristics. freshwater fishes of the western Gulf Slope of North America. John Wiley and Sons, New York, NY. Synonymy: A. fasciatus (Miller et al. Mayden, Astyanax fasciatus mexicanus (De Filippi, 1853) Common Name(s): sardinita mexicana [Spanish] Mexican tetra [English] Taxonomic Status: Current Standing: valid Data Quality Indicators: Record Credibility Rating: verified - standards met Ang Astyanax mexicanus sakop sa kahenera nga Astyanax, ug kabanay nga Characidae. Dowell, 1950. [6], A. mexicanus is a peaceful species that spends most of its time in midlevel water above the rocky and sandy bottoms of pools and backwaters of creeks and rivers of its native environment. Lee et al. In the winter, some populations migrate to warmer waters. Astyanax mexicanus Picture by The Native Fish Conservancy. Astyanax fasciatus mexicanus. Le tétra aveugle, tétra cavernicole ou tétra mexicain (Astyanax mexicanus) est une espèce de poissons d'eau douce de la famille des Characidés originaire de l'Amérique centrale. Gainesville, Florida. Blind Cave Tetra Blind Cave Tetra. Formerly found in the Rio All or most introductions have probably resulted from bait bucket releases (e.g., Miller and Robison 1973). 7.6-8.9cm (3-3.5 ") sg. 1979. [13] Blindness in A. mexicanus induces a disruption of early neuromast patterning, which further causes asymmetries in cranial bone structure. Contenu1 Données scientifiques2 Description 3 Paramètres de l’eau 4 Aquarium5 Comportement6 Nourriture7 Dimorphisme sexuel8 Reproduction Données scientifiques Nom scientifique : Astyanax mexicanus Nom commun : Tetragonopterus brevimanus (Sci) Anoptichtys jordani (Sci) Astyanax argentatus (Sci) Astyanax fasciatus (Sci) Astyanax fasciatus mexicanus (ancien) (Sci) … The zoogeography of Una ning gihulagway ni De Filippi ni adtong 1853. 2005). Surface fish possess large eyes that include a retina which is thick, well-differentiated, and clearly laminated. Albuquerque, NM. [15], Currently, about 30 cave populations are known, dispersed over three geographically distinct areas in a karst region of San Luis Potosí and far southern Tamaulipas, northeastern Mexico. [5][7][8][9][10][11] The Cueva Chica Cave in the southern part of the Sierra del Abra system is the type locality for A. It is unknown why this species did not develop transparent skin or eyelids instead, as some species of reptiles did. [3] Its blind cave form, however, is notable for having no eyes or pigment; it has a pinkish-white color to its body (resembling an albino). Walay nalista nga matang nga sama niini. North America north of Mexico. 51 pp. The fish in the Pachón caves have lost their eyes completely whilst the fish from the Micos cave only have limited sight. The Mexican tetra, Astyanax mexicanus, is a characin fish distributed throughout the rivers and caves of Northeastern Mexico .The river- or surface-dwelling form of Astyanax (surface fish) is typical of most other teleosts, including zebrafish. Es una especie introducida artificialmente en Filipinas. Unusual among tanagers, males molt out their brilliant blue and black pattern for part of the year, resembling the streaky green females. The Mexican tetra (Astyanax fasciatus) consists of an eyed epigean form (surface fish, Astyanax fasciatus fasciatus) and blind hypogean forms (cavefish, including Astyanax fasciatus mexicanus) . Mostly eastern and central Mexico and also the The absence of data does not equate to lack of effects. The Mexican tetra (Astyanax mexicanus), also known as the blind cave fish, blind cave characin, and blind cave tetra, is a freshwater fish of the family Characidae of the order Characiformes. 1992. lower Rio Grande, lower Pecos, and Nueces rivers in Texas (Lee et al. [5] Today large numbers are bred at commercial facilities, especially in Asia.[6]. The status and distribution of the freshwater Other articles where Astyanax mexicanus is discussed: cave fish: …of the best known is Astyanax mexicanus (previously Anoptichthys jordani), an eyeless, 7.5-cm characin (family Characidae) found in Mexico and often kept in home aquariums. Systematics, historical ecology, and North Notes on fishes recently introduced into southern California. The first. R. L., editor. [28], The blind cave tetras seen in the aquarium trade are all based on stock collected in the Cueva Chica Cave in the southern part of the Sierra del Abra system in 1936. California Fish and Game 36:435-436. [3] Additionally, the blind cave form is sometimes recognized as a separate species, A. jordani, but this directly contradicts phylogenetic evidence. The Nonindigenous Occurrences section of the NAS species profiles has a new structure. [12] References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables. Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) Min. [18] When the surface-dwelling ancestors of current cave populations entered the subterranean environment, the change in ecological conditions rendered their phenotype—which included many biological functions dependent on the presence of light—subject to natural selection and genetic drift. North Carolina State Museum of Natural History, Raleigh, NC. Possible explanations include: Another likely explanation for the loss of its eyes is that of selective neutrality and genetic drift; in the dark environment of the cave, the eyes are neither advantageous nor disadvantageous and thus any genetic factors that might impair the eyes (or their development) can take hold with no consequence on the individual or species. fishes. Modern genetics has made clear that the lack of use does not, in itself, necessitate a feature's disappearance. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. Matthews 1988). Because there is no selection pressure for sight in this environment, any number of genetic abnormalities that give rise to the damage or loss of eyes could proliferate among the population with no effect on the fitness of the population. Oklahoma. † Populations may not be currently present. 1990). Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. How to say Astyanax mexicanus in English? [3][4] The type species of its genus, it is native to the Nearctic realm, originating in the lower Rio Grande and the Neueces and Pecos Rivers in Texas, as well as the central and eastern parts of Mexico. 42. The gobies in the genus Typhleotris inhabit karst caves in Madagascar. (1991) provided distribution maps; these authors considered Mexican Members of several unrelated families have become blind cavefish. Taxonomy - Astyanax mexicanus (Blind cave fish) (Astyanax fasciatus mexicanus) (SPECIES) When browsing through different UniProt proteins, you can use the 'basket' to save them, so that you can back to find or analyse them later. En continuant à naviguer sur ce site, vous acceptez que nous en utilisions. fishes of southern California. Nonindigenous Aquatic Species Database. Minckley, W. L. 1973. There remains less chance of accidental damage and infection, since the previously useless and exposed organ is sealed with a flap of protective skin. Bulletin of the Southern California O peixe-cego, também conhecido como tetra-cego (Astyanax fasciatus mexicanus) é um peixe de água doce para aquário em crescendo de popularidade. Nevada, to Yuma, Arizona, with a key for identification. Names and dates are hyperlinked to their relevant specimen records. Sublette, This page was last edited on 7 December 2020, at 14:19. The generic name comes from Astyanax , a character in Greek mythology , who was the son of Hector of Troy ; in homage to this, several specific epithets also refer to the Iliad . Swift, C. C., T. R. Haglund, M. Ruiz, It [7][16][17] Among the various cave population are at least three with only full cave forms (blind and without pigment), at least eleven with cave, "normal" and intermediate forms, and at least one with both cave and "normal" forms but no intermediates. They become semi-aggressive as they age, and are by nature schooling fish. The Mexican tetra Astyanax mexicanus is an ideal organism for studying the relationships among neural tissue mass, energy demand, and adaptation. The type species is A. argentatus, now regarded as a form of the Mexican tetra (A. mexicanus). [19] This, combined with the ease of maintaining the species in captivity, has made it the most studied cavefish and likely also the most studied cave organism overall. It is being provided to meet the need for timely best science. The fishes of Ohio. it is predacious and highly aggressive, there is concern that this ; Page and Burr 1991). Coming from a subtropical climate, it prefers water with 6.5–8 pH, a hardness of up to 30 dGH, and a temperature range of 20 to 25 °C (68 to 77 °F). Arizona Fish and Game Department. [22], The blind form of the Mexican tetra is different from the surface-dwelling form in a number of ways, including having unpigmented skin, having a better olfactory sense by having taste buds all over its head, and by being able to store four times more energy as fat, allowing it to deal with irregular food supplies more effectively. Le tétra aveugle Astyanax mexicanus est un poisson, parfois cavernicole pour le tétra mexicain. SF have complex social interactions. Not developing eyes allows the individual more energy for growth and reproduction. Tank Size . Page, on the decline in many portions of the Pecos River drainage; as such, One such asymmetry is a bend in the dorsal region of their skull, which is propounded to increase water flow to the opposite side of the face, functionally enhancing sensory input and spatial mapping in the dark waters of caves. of Science 33(1955):52-53. Current alternative hypotheses suggest that adaptation to cave environments may have occurred either once or multiple times during the evolutionary history of this species. We highly recommend reviewing metadata files prior to interpreting these data. In contrast, Sublette et al. Because The Mexican cave fish is also referred to as the blind cave fish, blind cave characin, and blind cave tetra is a freshwater fish. 1981. One of the most puzzling questions concerns the social interactions between groups of SF, or groups of CF. [14] Scientists suggest that gene cystathionine beta synthase-a mutation restricts blood flow to cavefish eyes during a critical stage of growth so the eyes are covered by skin. River drainage and lower Rio Grande in New Mexico, but now restricted 1991. R. C., and W. J. Matthew. The species belongs to the family Characidae of the order Characiformes. and J. R. Stauffer, Jr. 1980 et seq. Identification: Although previously considered a subspecies of Astyanax fasciatus (Lee et al. Astyanax Fasciatus Mexicanus. [5] These were sent to an aquarium company in Texas, who soon started to distribute them to aquarists. [16], The blind and colorless cave form of A. mexicanus is sometimes recognized as a separate species, A. jordani, but this leaves the remaining A. mexicanus as a paraphyletic species and A. jordani as polyphyletic. Its natural diet consists of crustaceans, insects, and annelids, although in captivity it is omnivorous. 1957. It does, however, mean that research is required to evaluate effects before conclusions can be made. For queries involving fish, please contact Matthew Neilson. Freshwater pH. Coloration: Silvery except for a black lateral band which expands near the caudal base and narrows on the caudal fin (Sublette et al. Guide to the fishes of New Mexico. Difficulty. 1980 et seq. The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The lack of eyes disables the "body clock", which is controlled by periods of light and dark, conserving energy. (B) A. mexicanus based upon genomic information (Coghill et al., 2014). Ohio State University Press, Columbus, OH. et al. This is the Mexican blind … For queries involving invertebrates, contact Amy Benson. In the breeding male the dorsal and anal fins become yellowish to … [3], Growing to a maximum total length of 12 cm (4.7 in), the Mexican tetra is of typical characin shape, with unremarkable, drab coloration. tetra populations recorded from the Rio Grande drainage in southern New Houghton Mifflin Company, Boston, MA. In contrast to regressive traits, the purpose or benefit of constructive traits is generally accepted. [19] Active research focuses on the mechanisms driving the evolution of regressive traits, such as the loss of eyes, in A. mexicanus. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Although previously considered a subspecies of. For cavefish in general, see. [19][22] One of the most striking changes to evolve was the loss of eyes. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information. Characters. Astyanax fasciatus (Cuvier, 1819) (or Astyanax mexicanus (De Filippi, 1853), depending on one's taxonomic preferences) - Mexican blind cavefish from southern Mexico (captive, Newport Aquarium, Newport, Kentucky, USA). [5] Other blind populations were initially also recognized as separate species, including antrobius described in 1946 from the Pachón Cave and hubbsi described in 1947 from the Los Sabinos Cave (both subsequently merged into jordani/mexicanus). Cette espèce préfère les lagons à fond sableux ou rocheux, mais elle fréquente une grande diversité d'habitats, y compris les torrents rapides. [26] In this context, the positive genetic benefits have to be considered, i.e., what advantages are obtained by cave-dwelling tetras by losing their eyes? Media in category "Astyanax mexicanus" The following 23 files are in this category, out of 23 total. 1993. The list of references for all nonindigenous occurrences of Astyanax mexicanus are found here. The eyeless, troglomorphic form is found only in Mexico but this species is in fact widely-distributed from the southern United States of Texas and New Mexico, through Mexico itself and into Guatemala. The occurrence of Astyanax fasciatus mexicanus in Lake Texoma, [3][6], The Mexican tetra has been treated as a subspecies of A. fasciatus, but this is not widely accepted. These two morphs differ by numerous traits, including behaviors. El astyanax mexicanus habita en Norteamérica y Centroamérica. [citation needed] Experiments have shown that keeping these fish in bright aquarium set-ups has no effect on the development of the skin flap that forms over their eyes as they grow. Subtropical America. Jump to: navigation, search. Proceedings of the Oklahoma Academy Froese, Rainer and Pauly, Daniel, eds. [5] Their lack of sight does not hinder their ability to get food. Astyanax mexicanus is an emerging model system to investigate behavioral evolution. The Mexican tetra (Astyanax mexicanus), also known as the blind cave fish, blind cave characin, and blind cave tetra, is a freshwater fish of the family Characidae of the order Characiformes. The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. V. E., and C. D. Riggs. Grande valley in New Mexico, but now possibly extirpated (although 68:1-7. Easy. [5] The most divergent cave population is the one in Los Sabinos. Table 1. Astyanax fasciatus Picture by Galtier Delbosc, M. Classification / Names Common names | Synonyms | Catalog of Fishes ( gen. , sp. ) The fishes of Oklahoma. L. M., and B. M. Burr. 1978. List of the fishes of California. Maximum size: 100 mm SL (Birkhead 1980; Miller et al. 6.8 - 7.3 Temp. Ce poisson, en particulier la forme aveugle, est assez populaire chez les aquariophiles et ses adaptations troglodytiques font l'objet d'études scientifiques. A field guide to freshwater fishes of Hubbs, C. L., W. I. Prefere águas duras e aquários especializados. The Peterson Field Guide Series, volume North American freshwater fishes. Originalmente procede de las cuencas del río de Nuevo México y Texas. Fish and Game 38(1):7-42. Historically, found in the Pecos Helfman G., Collette B., & Facey D.: The Diversity of Fishes, Blackwell Publishing, p 315, 1997. [5], This fish, especially the blind variant, is reasonably popular among aquarists. Le tétra aveugle ou tétra cavernicole (astyanax fasciatus mexicanus) est une sous-espèce du tétra mexicain (astyanax mexicanus) qui lui vit en surface.C’est un poisson d’eau douce cavernicole de la famille des characidés, originaire des … P. Garrett, R. J. Edwards, S. M. Dean, E. Marsh, and D. Belk. and Page and Burr introduced. | ITIS | CoL | WoRMS | Cloffa. Astyanax fasciatus mexicanus Description: The body of the Blind cavefish is typical of the tetra (one of several species of small freshwater fish in the family Characidae ) – elongated and compressed laterally. Astanax- Greek for "son of Hector", mexicanus- Latin "from Mexico"(Edwards 1999). Astyanax mexicanus (De Filippi, 1853) Mexican tetra Upload your photos and videos Pictures | Google image. California Academy Science Occasional Papers 133. 1986. Established in Texas (outside native range). the species is classified as "state endangered" by New Mexico (Sublette Astyanax mexicanus (De Filippi, 1853) Mga sinonimo; Tetragonopterus streetsii Cope, 1872 Tetragonopterus nitidus Bocourt, 1868 Tetragonopterus fulgens Bocourt, 1868 Tetragonopterus petenensis Günther, 1864 Tetragonopterus brevimanus Günther, 1864 Astyanax argentatus Baird & Girard, 1854 Astyanax fasciatus (De Filippi, 1853) now appears to be extirpated from the Rio Grande in New Mexico and is Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted. (A) Astyanax fasciatus based upon both morphological and molecular data (Wilkens, 1988; Strecker et al., 2004). fauna from 1973 to 1988. California J. E., M. D. Hatch, and M. Sublette. Astyanax fasciatus (Mexican blind cavefish) 1 (15719439215).jpg 1,490 × 604; 261 KB Hubbs, C., T. Lucier, G. This is the only characid species native to the United States. 2005). Texas Journal of Science 30(4):369-376. Sims Printing Company, Inc., Phoenix, AZ. Trautman, M. B. [2020]. Lee, Riggs, C. D. 1954. 413-456 in C. H. Hocutt and E. O. Wiley, editors. Lambou, V. W. 1962. Zoogeography of Academy of Science 92(3):101-167. 1992). constituted part of the species' natural or historical distribution. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Description de Astyanax mexicanus (Tétra aveugle, Tétra cavernicole):. University of New Mexico Press, Albuquerque, NM. Hypogean cave populations are characterized by eye degeneration, loss of melanin pigmentation and a greater weight per unit length [49] . and Menidia audens in Lake Texoma. to the Pecos drainage downstream of Dexter (Sublette et al. 1988. Bait fishes of the lower Colorado River, from Lake Mead, Koster, W. J. Native range data for this species provided in part by. 57 Litres (15 US G.) Size. 1952; Minckley 1973). Achat en ligne de poissons et d'invertébrés d'eau douce ou d'eau de mer pour aquarium • Astyanax fasciatus mexicanus Aquaterra-Diffusion. However the species does use other methods to locate food and detect danger, which also consume energy that would be conserved if it had eyes or transparent eyelids. They prefer subdued lighting with a rocky substrate, like gravel, mimicking their natural environment. Sublette et al. (2015). Follett, and L. J. Dempster. The species Astyanax mexicanus comprises both surface fishes (SF) that inhabit rivers and cave-adapted fishes (CF). Accessed [12/9/2020]. Proceedings of the Oklahoma Academy of Science mexicanus). The type species of its genus, it is native to the Nearctic realm, originating in the lower Rio Grande and the Neueces and Pecos Rivers in Texas, as well as the central and eastern parts of Mexico. Further observation on Astyanax fasciatus (1990) believed that this area Citation information: U.S. Geological Survey. [5][7][8][9][10][11], A. mexicanus is famous for its blind cave form, which is known by such names as blind cave tetra, blind tetra (leading to easy confusion with the Brazilian Stygichthys typhlops), blind cave characin and blind cavefish. Recent studies have produced evidence that the mechanism may be direct selection,[23] or indirect selection through antagonistic pleiotropy,[24] rather than genetic drift and neutral mutation, the traditionally favored hypothesis for regressive evolution. The blind cave tetra is a hardy species. Proceedings of the Louisiana Academy of Sciences 25:75-79. Pronunciation of Astyanax mexicanus with 2 audio pronunciations and more for Astyanax mexicanus. [5][17][21], The surface and cave forms of the Mexican tetra have proven powerful subjects for scientists studying evolution. 1990. jordani. This information is preliminary or provisional and is subject to revision. Astyanax mexicanus é unha especie de peixes da familia Characidae da orde dos Characiformes.. Esta especie foi ás veces tratada como unha subespecie de A. fasciatus, pero isto non está amplamente aceptado. Dawkins, R.: Climbing Mount Improbable, W. W. Norton & Co, 1997, 10.2305/IUCN.UK.2013-1.RLTS.T62191A3109229.en, http://www.fishbase.se/Nomenclature/SynonymsList.php?ID=2740&SynCode=23916&GenusName=Astyanax&SpeciesName=mexicanus, "The complex origin of Astyanax cave fish", "Regressive evolution in Astyanax cavefish", "Gene flow and population structure in the Mexican blind cavefish complex (Astyanax mexicanus)", "Evidence for multiple genetic forms with similar eyeless phenotypes in the blind cavefish, Astyanax mexicanus", "The energetic cost of vision and the evolution of eyeless Mexican cavefish", "Evolution of an adaptive behavior and its sensory receptors promotes eye regression in blind cavefish", "Gene found that causes eyes to wither in cavefish", "Evolution of eye development in the darkness of caves: adaptation, drift, or both? taken in recent years and is now considered extirpated (Cashner and New Mexico Department of Game and Fish, University of New Mexico Press, Blind Cave Tetra (Astyanax fasciatus mexicanus) From The Aquarium Wiki. D. S., C. R. Gilbert, C. H. Hocutt, R. E. Jenkins, D. E. McAllister, Confidentialité et cookies : ce site utilise des cookies. Miller, R. J., and H. W. Robison. The fishes of New Mexico. But evolution is a non-directional process, and while increased complexity is a common effect, there is no reason why evolution cannot tend towards simplicity if that makes an organism better suited to its environment. Since then, these have been selectively bred for their troglomorphic traits. 1990). R. R. 1952. Aller au contenu. Astyanax fasciatus mexicanus (De Filippi, 1853) Kaliwatan sa isda ang Astyanax mexicanus. species could impact native fishes by preying on their young (Miller [12], These fish can still, however, find their way around by means of their lateral lines, which are highly sensitive to fluctuating water pressure. This is referred to as a "regressive trait" because the surface fish that originally colonized caves possessed eyes. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. ", "Sensory Adaptations of Fishes to Subterranean Environments", "To See or Not to See: Evolution of Eye Degeneration in Mexican Blind Cavefish", "Genes, modules and the evolution of cave fish", "Regressive Evolution in Astyanax Cavefish", "Cryptic variation in morphological evolution: HSP90 as a capacitor for loss of eyes in cavefish", https://en.wikipedia.org/w/index.php?title=Mexican_tetra&oldid=992861076, Articles with unsourced statements from April 2018, Articles with unsourced statements from January 2014, Creative Commons Attribution-ShareAlike License, Mexican tetra, normal form (above) and blind cave form (below). Astyanax fasciatus mexicanus (De Filippi, 1853) Taxonomic Serial No. Cashner, 1973. Found from Mexico to Southern Brazil, for decades this species has been popular in zoos and private aviaries where they have been bred for more than 60 years.