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The Mexican tetra (Astyanax mexicanus), also known as the blind cave fish, blind cave characin or the blind cave tetra, is a freshwater fish in the Characidae family (tetras and relatives) of the order Characiformes. [4][5] The type species of its genus, it is native to the Nearctic realm, originating in the lower Rio Grande, and the Neueces ...
The Mexican blind brotula and other cave-dwelling brotulas are among the few species that live in anchialine habitats. Although many cavefish species are restricted to underground lakes, pools or rivers in actual caves, some are found in aquifers and may only be detected by humans when artificial wells are dug into this layer.
Psalidodon Eigenmann, 1911. Zygogaster Eigenmann, 1913. Astyanax is a genus of freshwater fish in the family Characidae of the order Characiformes. Some of these fish, like many of their relatives, are kept as aquarium pets and known collectively as tetras.
Astyanax jordani is a freshwater fish of the characin family (family Characidae) of order Characiformes, native to Mexico. [3][4] It is sometimes called the cave tetra, or by its local Spanish name sardina ciega. A blind cave fish, A. jordani is very closely related to the Mexican tetra (A. mexicanus) and their taxonomy is disputed.
Mexican blind brotula. The Mexican blind brotula (Typhliasina pearsei) is a species of viviparous brotula endemic to Mexico, where it is found in sinkholes and caves. It is known as sak kay in Mayan and dama blanca ciega in Spanish. This cavefish grows to a standard length of 9.7 cm (3.8 in). It is the only known member of its genus.
Amblyopsidae. The Amblyopsidae are a fish family commonly referred to as cavefish, blindfish, or swampfish. They are small freshwater fish found in the dark environments of caves (underground lakes, pools, rivers and streams), springs and swamps in the eastern half of the United States. Like other troglobites, most amblyopsids exhibit ...
Synbranchus infernalis (Hubbs, 1938) The blind swamp eel ( Ophisternon infernale) is a species of fish in the family Synbranchidae. It is endemic to Mexico where it lives in cave systems and is known in Spanish as the anguila ciega. The International Union for Conservation of Nature has rated this cavefish as "endangered".
And blind cave fish living in what is considered the largest cave in the world, Hang Son Doong, in Vietnam. It took the crew two days of trekking through the jungle, carrying provisions and gear ...