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- Cave-dwelling fish, which may belong to one
- of several quite unrelated groups,
- independently adapted to life in underground
- waters. They have in common a tendency to
- blindness and atrophy of the eye, enhanced
- touch-sensitive organs in the skin, and loss
- of pigment. The Kentucky blind-fish
- Amblyopsis spelaea, which lives underground
- in limestone caves, has eyes which are
- vestigial and beneath the skin, and a
- colourless body. The Mexican cave characin is
- a blind, colourless form of Astyanax
- fasciatus found in surface rivers of Mexico.
-