What are some species of animals that don’t have eyes?



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    Troglobites, or cave dwelling species, often are blind or born without eyes at all. Their environment is so dark that they have no use for eyes and have so well adapted to cave dwelling they would be unable to survive in any other place. Instead, many have developed a sense organ for detecting vibrations and consequently to let them know where objects and potential predators or prey are. Examples are the Blind Cave Tetra which is a cave dwelling fish. The Olm Salamander has no eyes and no color, and Grotto Salamanders also known as Ghost Lizards are born with eyes which are sucked into their bodies as adults. Worms commonly don’t have eyes either.

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