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Published online 24 January 2008 | Nature | doi:10.1038/news.2008.524
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Blind fish see shadows
Sightless cavefish still swim away from the light.
Blind cavefish (Astyanax mexicanus) can sense light when young, even though their eyes lost their function over a million years of evolution. Scientists have found that the fish larvae can detect an overhead shadow and seek shelter by swimming towards it.
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