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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 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 adaptations to these ...
Cavefish. Garra andruzzii showing the pale colour and lack of eyes typical of cavefish. The large red spot on the head is the blood-filled gills, visible through the semi-transparent gill cover. Cavefish or cave fish is a generic term for fresh and brackish water fish adapted to life in caves and other underground habitats.
Garra andruzzii, a species of cyprinid fish, formerly the only species of the genus Phreatichthys, and is endemic to Somalia. [ 1] This cave-adapted fish is whitish (not pigmented) and blind. It has no scales. [ 2] It is considered to have evolved in the cave environment for some two million years. [ 3]
The blind cave eel (Ophisternon candidum) is a species of cavefish in the family Synbranchidae.It is the longest cavefish in Australia (up to 40 cm (16 in)) [2] and one of the only three vertebrates in Australia that is restricted to underground waters, the other being the blind gudgeon (Milyeringa veritas) and the Barrow cave gudgeon (Milyeringa justitia). [3]
The two halves are divided by a band of tissue and the eye has two pupils, connected by part of the iris. The upper half of the eye is adapted for vision in air, the lower half for vision in water. [35] The lens of the eye changes in thickness top to bottom to account for the difference in the refractive indices of air versus water. These fish ...
Typhleotris mararybe is a critically endangered species of fish in the family Milyeringidae, the blind cave gobies. It is a troglobitic species endemic to cave habitat in southwestern Madagascar. It is unique among known cave-dwelling fish in that is both blind and darkly pigmented. [2] It has well-developed nonvisual sensory systems and dives ...
Amblyopsis. Amblyopsis is a genus of small (up to 11 cm or 4.3 in long) fish in the family Amblyopsidae that are endemic to the central and eastern United States. [1] Like other cavefish, they lack pigmentation and are blind. [2] The most recently described species was in 2014. [3] Uniquely among fish, Amblyopsis brood their eggs in the gill ...