| The Ozark cavefish and Ozark cave crayfish seem to be stable, although actual population sizes are unknown. |
| However, the cavefish eye seems to develop normally up to about the hatching stage, forming a lens and optic cup. |
| Closed as a tourist attraction in 1943, Horse Cave has been successfully restored, even luring back the rare blind cavefish. |
| Third, despite the loss of its own lens, the cavefish eye and accessory tissues have retained the ability to respond to signals generated by a normal surface fish lens. |
| The researchers were able to regulate cavefish circadian clocks by creating a regular feeding schedule. |
| Researchers work in the dark caves where the Ozark cavefish evolved with no eyes. |
