Troglomorphism
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Troglomorphism is the morphological adaptation of an animal to life in the constant darkness of caves, characterised by features such as loss of pigment, reduced eyesight or blindness, and attenuated
Texas cave salamander
Mexican tetra
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The Mexican tetra, also known as the blind cave fish, blind cave characin or the blind cave tetra, is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American ch
Troglomorphism
…While general trends are common among troglomorphic species, the traits of individual species can be highly variable. For example, in species like the Mexican tetra, some populations retain their eyes while others tend towards eye loss, and can interbreed with one another. Some Mexican tetra retain pigmentation…
Mexican Tetra
Astyanax mexicanus 01
Blind cave fish form
Surface form (top), cave form (bottom)