Incredible But True Incredible But True Human World History Makers Cities Of The World Art And Music Sporting Headlines Plant Life Fish, Amphibians, Reptiles Birds and Mammals Creepy Crawlies Marine Life Restless Earth Earth's Secrets Changing Weather Seas And Oceans Comparisons Amazing Structures Machines And Man World Of Inventions Travelling Around Mysterious Universe	Dark Cave As their name suggests, Mexican cave fish inhabit underwater caves. Living in complete darkness, the fish have no eyes at all.   Previous: Back Book: Incredible But True Section: Incredible But True Chapter: Fish, Amphibians, Reptiles