Animalia > Chordata > Characiformes > Characidae > Astyanax > Astyanax mexicanus

Astyanax mexicanus (Mexican tetra; Blind cavefish)

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Wikipedia Abstract

The Mexican tetra or blind cave fish (Astyanax mexicanus) is a freshwater fishof the family Characidae of the order Characiformes. The type species of its genus, it is native to the Nearctic ecozone, originating in the lower Rio Grande and the Neueces and Pecos Rivers in Texas, as well as the central and eastern parts of Mexico. This fish, especially the blind variant, is reasonably popular among aquarists. The Mexican tetra has been treated as a subspecies of A. fasciatus, but this is not widely accepted.
View Wikipedia Record: Astyanax mexicanus

Endangered Species

Status: Vulnerable
View IUCN Record: Astyanax mexicanus


Adult Length [1]  4.724 inches (12 cm)
Brood Dispersal [1]  In the open
Brood Egg Substrate [1]  Phytophils
Brood Guarder [1]  No
Litter Size [1]  18,714
Maximum Longevity [1]  4 years
Migration [2]  Potamodromous
Diet [2]  Omnivore, Planktivore, Detritivore
Female Maturity [1]  1 year


Name Countries Ecozone Biome Species Report Climate Land
Colorado Mexico, United States Nearctic Xeric Freshwaters and Endorheic Basins    
East Texas Gulf United States Nearctic Temperate Coastal Rivers    
Panuco Mexico Neotropic Tropical and Subtropical Coastal Rivers    


Range Map

External References

NatureServe Explorer


Attributes / relations provided by
1Frimpong, E.A., and P. L. Angermeier. 2009. FishTraits: a database of ecological and life-history traits of freshwater fishes of the United States. Fisheries 34:487-495.
2Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at
3Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0