Mexican tetra/blind cave fish species profile

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Anders247

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Anders247 submitted a new Article:

Mexican tetra/blind cave fish species profile

View attachment 617
By User:Haplochromis - Self-photographed, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3037258

Above is the blind, cave form, the lower one is the normal surface dwelling form.

This fish, as you can see, has two forms in the wild, which are the same species. One is eyeless and pink, the other a normal fish.

This species, although a tetra, is not particularly gregarious, so does not require a group. But they will be fine in groups....
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CarpCharacin

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Just curious, what determines if they are blind or if they have eyes? Is it just the genetic strain?
 

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Anders247

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Great Article !

The Mexican tetra, lives in deep, dark caves in the warm waters of Central America. They are born with eyes, but as they get older, skin grows over them and their vision degenerates.
Thanks!
 
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