L Roebuck
Technical Support
Caving
^V^ Just a caver
Posts: 2,023
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Post by L Roebuck on Jan 29, 2008 19:32:07 GMT -5
Blind Cavefish Not So Blind After AllBy Charles Q. Choi, Live Science, Fox News Blind cavefish whose eyes have withered away may not be so blind after all. Instead, a light-sensitive organ in their brains can detect light, research now reveals. The blind cave-dwelling form of the Mexican tetra (Astyanax mexicanus) evolved from surface-dwelling ancestors whose eyes degenerated after the fish shifted their habitat into complete darkness a million or more years ago. These albino cavefish dwell today in freshwater caves in northeastern Mexico, with skin growing over their now useless eyes. Full Text
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