An eerie "demon fish" with no eyes and completely transparent skin has been discovered lurking in subterranean waters directly beneath a secretive US military base dubbed "Alabama's Area 51".
The tiny, creepy creature, measuring just two inches long, was uncovered in a single, pitch-black underground cave system beneath the US Army's Redstone Arsenal in Huntsville.
Scientists who stumbled across the terrifying-looking specimen have officially named it Demogorgonichthys arcanus, or the "demon cavefish".
Evolutionary anomaly
Despite being discovered beneath a high-security facility closely tied to classified rocket research and long-standing UFO rumours, the strange organism isn't an alien lifeform. However, genetic analysis revealed it is an incredible evolutionary anomaly that split from its closest ancestors over 11.6 million years ago.
Having adapted to a life of total, relentless darkness deep underground, the fish completely shed its eyes and skin pigmentation, replacing them with specialized sensory organs scattered across its body to hunt and navigate.
Astonishingly, it evolved side-by-side in the exact same cave pools alongside another species, the Southern Cavefish (Typhlichthys subterraneus), but followed an entirely different genetic path.
Discovery and habitat
Dr Matthew Niemiller, associate professor of biological sciences at the University of Alabama, said: "This is one of the last places we'd have bet on it.
"Finding an entirely unknown, new genus of freshwater fish in eastern North America today is a little like finding a new kind of big cat.
"The group is so well known, we thought the big surprises were behind us. To have one turn up in a cave we've watched for three decades is a real reminder to stay curious. It was genuinely surprising."
Only a handful of the ghostly fish were spotted between 2019 and 2025 during surveys published in Scientific Reports.
Because it exists only within a single location beneath the military base, experts warn it is critically endangered and extremely vulnerable to environmental changes.
Contamination threats
Iron-clad security around Redstone Arsenal has inadvertently protected the cave from public developments. However, researchers discovered the creature's fragile habitat is actively contaminated with toxic remnants of chemical weapons and explosives.
Writing in their study, the research team said: "Trace metals, including cadmium, chromium, and lead, have been detected at elevated concentrations in water samples from Bobcat Cave over the past two decades."
The contamination stems from an old industrial zone on the base where the military historically disposed of weapons materials, which slowly leaked into the groundwater.
First opened in 1941, Redstone Arsenal was the birthplace of NASA and currently employs over 45,000 personnel. However, its recent selection as the headquarters for US Space Command has sparked wild internet conspiracies that ET technology was relocated there from Area 51 in Nevada.
Before her death in 2022, local anti-gravity researcher Amy Eskridge fuelled the rumours during an interview, claiming: "Redstone Arsenal in Huntsville, Alabama is the biggest f****** deal that you've never heard of."
