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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 ...
Description. Garra barreimiae is a small, slender fish, somewhat flattened on the underside. It grows to a length of about 7–8 cm (2.8–3.1 in). [3] [4] The head is wedge-shaped and has a suction plate on the lower jaw and a blunt snout. This fish is a fairly dark colour and is speckled; it has a paler transverse band just behind the head.
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.
Mahi Kur Cave. Mahi Kur Cave is a cave located in Lorestan province [1] in Papi district, near a village called Levan. This cave is the only national natural monument of Lorestan province and was registered in 2006. There are two rare and unique specimens of blind fish in this cave that have not been found anywhere else in the world.
Distribution. This species is more commonly known as the Southern cavefish. This name is due to the southern states in which it is found, including Indiana, Alabama, Kentucky, Georgia, Missouri, Tennessee, Arkansas, and Oklahoma. The subterranean waters where the cavefish is found is divided by the Mississippi River.
The optic nerve is a bundle of millions of fibers in the retina that sends visual signals to the brain. Damage and death of these nerve cells, or neurons, leads to characteristic features of optic neuropathy. The main symptom is loss of vision, with colors appearing subtly washed out in the affected eye.
The northern cavefish or northern blindfish (Amblyopsis spelaea) is found in caves through Kentucky and southern Indiana. The International Union for Conservation of Nature lists the species as near threatened. [1] The life cycle of northern cavefish includes a protolarval stage. In this stage, eggs and those that have recently hatched into ...