Scientists Identify New Blind Cave Fish Species in Alabama Military Cave

Researchers exploring Bobcat Cave, a limestone network within a restricted military site in northern Alabama, have described a new blind fish species called Demogorgonichthys arcanus. The discovery occurred when Matthew L. Niemiller, a cave biologist from the University of Alabama in Huntsville, fell into a deep water pool during a February 2025 survey and observed the pale, duck-billed fish. Unlike the Southern cave fish already documented in the system, genetic analysis indicates the new species diverged independently and lost its eyesight via different mutations.

Both species now share the same chambers and pools, a rare example of cohabiting cave fish. The research, published in Scientific Reports, underscores how even heavily monitored subterranean habitats can harbor undiscovered life forms. Ecologist Suzanne McGaugh of the University of Minnesota praised the discovery as a reminder of the vast unknown biodiversity still present in explored caves.