Researchers from the University of Alabama in Huntsville, in collaboration with scientists from three other regional universities, have identified a new genus and species of eyeless, colorless cavefish — formally named Demogorgonichthys arcanus and informally called the 'demon cavefish' — in Bobcat Cave, located beneath the US Army's Redstone Arsenal in Huntsville, Alabama. Their findings were published in Scientific Reports in July.
New eyeless cavefish genus discovered beneath Alabama Army base after three decades of monitoring
Researchers from the University of Alabama in Huntsville, in collaboration with scientists from three other regional universities, have identified a new genus and species of eyeless, colorless cavefish — formally named Demogorgonichthys arcanus and informally called the 'demon cavefish' — in Bobcat Cave, located beneath the US Army's Redstone Arsenal in Huntsville, Alabama. Their findings were published in Scientific Reports in July.
The fish is described as less than two inches long, lacking eyes and pigmentation, and appearing faintly electric blue in life. The genus name Demogorgonichthys references the mythological underworld figure 'Demogorgon,' known through the game Dungeons and Dragons and the Netflix series Stranger Things, while the species name arcanus means 'hidden' or 'secret,' according to UAH.
Bobcat Cave has been monitored at least quarterly for more than 30 years, making the discovery unexpected. The same pool in which Demogorgonichthys arcanus was found also hosts the Southern Cavefish, a separate and distantly related species. According to the researchers, the two species independently lost their eyes and pigmentation millions of years apart, a phenomenon they describe as convergent evolution.
Because the fish has so far been found only in the single cave and its connected aquifer beneath the military installation, researchers consider it highly vulnerable. While the restricted-access base limits direct physical disturbance to the cave, the species remains exposed to surface-originating threats including contaminants, sediment, and changing water conditions, according to UAH.
The research team's published report states that trace metals — including cadmium, chromium, and lead — have been detected at elevated concentrations in water samples from Bobcat Cave over the past two decades, with contamination attributed likely to residue from chemical weapons associated with the military base.
Redstone Arsenal handles defense, missile, and classified aerospace programs and has been compared in popular usage to a secretive facility, though this characterization does not appear in the scientific findings.
- No response or comment from the US Army or Redstone Arsenal is included in the source regarding the contamination findings or access to the cave.
- The specific methodology used to determine that contamination likely originated from chemical weapons residue at the base is not detailed.
- The conservation or regulatory status of the species, and whether any protective measures are planned, is not addressed.
- The identities and institutional affiliations of the collaborating researchers from the three other regional universities are not specified.
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