Astyanax cordovae

Astyanax cordovae is a small species of freshwater fish only found in Argentina. Its range is restricted to the Primero and Segundo rivers at low elevations, and it is an infrequent sighting therein. This makes it unique, as the only fish species endemic to the region. Most of its time is spent near the riverbed. It is an omnivore with a preference for land-dwelling insects that get washed into the river from shore.

While A. cordovae has a limited collection of species-specific research, conservationists are certain that it is a threatened species. This is not only due to its limited range but also because that range is decreasing. A variety of factors are at play, such as exploitation of biological resources and the destruction of riparian zones. Further, there are no protections in place for it.