A Blind ‘Demon’ Is Lurking in a Cave Beneath a U.S. Army Base. Scientists Just Found It.

Key Points:

• Researchers discovered a new genus and species of cavefish, Demogorgonichthys arcanus or "demon cavefish," in Bobcat Cave beneath the U.S. Army's Redstone Arsenal in Huntsville, Alabama.
• The demon cavefish is evolutionarily distinct from the southern cavefish found in the same cave, demonstrating convergent evolution as both species independently lost their eyes and pigment millions of years apart.
• Despite Bobcat Cave being monitored regularly for 30 years, the demon cavefish remained undiscovered likely due to its deeper aquifer habitat and lack of a rhodopsin gene linked to light sensitivity.
• The federally protected land above the cave has inadvertently preserved this unique subterranean ecosystem, highlighting the importance of protecting surface environments to conserve underground biodiversity.
• Scientists emphasize that North Alabama's cave systems are still incompletely studied, and the discovery of the demon cavefish underscores the potential for more unknown species in these well-explored areas.