'Demon cave fish' discovered hiding in Alabama military base for 40 years
This species, resembling Stranger Things' Demogorgon, was found by accident.
1The secret cave in a military base
Bobcat Cave, located within a military installation in northern Alabama, consists of narrow, labyrinthine limestone passages. Regularly visited since the 1990s to monitor the endangered Alabama cave shrimp, the cave is known for its challenging conditions. Scientists must crouch and, depending on water levels, wade through neck-deep water to explore its depths.
2An accidental encounter
During a routine survey in February 2025, cave biologist Matthew L. Niemiller slipped in the red Alabama mud and fell into a deep pool. There, he encountered a fish species he had never seen before. The fish had a humped back, a slightly duck-billed snout, and no eyes. Under their headlamps, it appeared bluish-white, distinct from other cave-dwelling fish in the system.
3Named after the Demogorgon
Scientists named the newly discovered species 'Demogorgonichthys arcanus,' a nod to the otherworldly creature from the Netflix series Stranger Things. This name reflects the fish's eerie appearance and its hidden existence within the military base. The genetic analyses of the species were published in a paper in Scientific Reports.
4Genetic surprise
Genetic analyses revealed that the demon cave fish and the Southern cave fish, which share the same cave system, are not closely related. Different genetic mutations caused the loss of eyes in each species. This finding suggests the two species have coexisted in the same cave system for millions of years.
5A struggle for coexistence
The demon cave fish and the Southern cave fish not only share the same cave system but also inhabit the same pools and chambers. While other cave fish live like neighbors, these two species behave like roommates—ones that may have preyed on each other's offspring. This dynamic highlights the intense competition within cave ecosystems.
6A significant discovery for biodiversity
Suzanne McGaugh, a cave fish expert at the University of Minnesota, says this discovery is a humbling reminder of how much biodiversity remains undocumented. 'Even in the most explored caves, new species can still be found,' she notes. The demon cave fish underscores the value of studying restricted areas like military bases.
7Secrets of the cave ecosystem
Bobcat Cave is home not only to the demon cave fish but also to the endangered Alabama cave shrimp. These species have survived the cave's isolated and harsh conditions. Scientists regularly visit the cave to collect data and understand how this unique ecosystem functions.
8Echoes in the scientific community
The discovery of the demon cave fish has made waves in the scientific community. Its genetic traits and habitat make it a subject of great interest. The find also highlights the need to protect and study biodiversity in restricted areas like military bases. Researchers believe similar discoveries will follow in the future.