Vitatech Laboratories Internal Fauna Report: Erebus Native Macrobe Species
Prepared by Dr. Yoon-Seo Kim, Senior Field Biologist, Mictlan Sector
Confidential: For Vitatech Research Division Use Only
Introduction
The macrofauna of Erebus remains remarkably scarce in both species diversity and overall biomass, a result of the planet’s extreme cold, aridity, and nutrient limitations. However, the adapted native species present an outsized hazard to both field research and industrial activities. This report provides a summary of the principal large native species confirmed by Vitatech survey teams, including their ecological roles, observed behaviors, and relevant risks. All personnel should regard these species as highly dangerous, even in low densities.
Surface and Permafrost Zone
Remorhaz
Remorhazes are immense, heat-generating predators that tunnel deep beneath Erebus’s permafrost. Their armored, centipede-like bodies melt ice and stone as they move, creating unstable tunnels and pockets of sudden thaw. Drawn to vibrations from mining or heavy equipment, they can erupt without warning, destroying machinery and endangering teams. Encounters are rare but catastrophic, leaving behind scorched tunnels and slumped, liquefied ground. All personnel are advised to monitor for sudden temperature spikes and vacate areas at the first sign of remorhaz activity.
Frost Worm
Frost worms are massive, pale annelids that burrow deep beneath Erebus’s frozen crust. With icy breath and a sonic shriek capable of shattering stone, these solitary predators are a serious threat to mining operations. They surface only when disturbed by excavation or natural seismic shifts, causing collapses and freezing anything in their path. Evidence of frost worm activity includes collapsed tunnels, sudden cold fronts, and strange vibrations. Team leaders should halt all operations if frost worm presence is suspected and retreat immediately.
Destrachan
Destrachans are aberrant, eyeless predators that roam the frozen surface plains and deep crevasses of Erebus. Their bodies are sleek and rubbery, with powerful legs for bounding across uneven ice and stone. Instead of eyes, they navigate and hunt by emitting complex, bone-rattling sonic pulses that can shatter ice or stone and disorient prey. Destrachans are most active during geomagnetic storms, when their calls echo for miles. While encounters remain rare, teams have reported equipment malfunctions, sudden collapses, and unexplained injuries in areas where destrachan activity is suspected. Personnel is advised to monitor for unusual vibrations and avoid isolated travel during periods of high destrachan activity.
Subterranean Ecosystems
Cave Fisher
Cave fishers are arachnid predators dwelling on cavern ceilings and abandoned shafts. They hunt by lowering strong, sticky filaments to snare passing prey, including small fauna or workers. Their silk is valuable for its incredible strength, but a single cave fisher can incapacitate an entire corridor. Signs of their presence include glistening lines stretched across open spaces. Workers should never attempt removal alone. Caution: sudden movement or noise can provoke an attack, and teams should avoid areas where cave fisher lines are found.
Darkmantle
Darkmantles are small, octopoid ambush predators that cling to cave ceilings and tunnel vaults. When prey passes beneath, they drop down, enveloping their target and creating a magical sphere of darkness. Victims are suffocated and disoriented, making rescue difficult. Darkmantles are most active in humid, poorly lit sectors, and their presence is often first detected by unexplained equipment malfunctions or missing personnel. Any sign of darkmantle activity warrants increased lighting and immediate reporting to sector management for coordinated removal.
Otyugh
Otyughs are squat, tentacled scavengers that thrive in Erebus’s waste pits and runoff pools. Feeding on organic waste, refuse, and even chemical sludge, they help control contamination but pose a risk to personnel. Otyughs may attack if startled or if food is scarce, using their strong limbs and biting maw. Their presence is a warning sign of poor sanitation. Personnel should avoid direct contact, report sightings immediately, and use protective gear when working near waste channels where otyughs are known to reside.
Xorn
Xorn are rocky, three-legged elemental creatures that dwell deep within Erebus’s mineral-rich strata. They consume ores and precious metals, phasing effortlessly through solid stone to seek out new deposits. Usually non-aggressive, xorn can become hostile if threatened or if mining operations disturb their feeding grounds. Their presence is often indicated by missing ore, unusual vibrations, or strangely patterned tunnels. Teams encountering xorn should avoid confrontation and report sightings to management, as xorn activity can signal both valuable minerals and potential hazards.
Grick
Gricks are stealthy, worm-like predators inhabiting the deepest tunnels and abandoned mining shafts of Erebus. Their rubbery, segmented bodies blend seamlessly with stone, while their beaked, tentacle-ringed maws can snap through bone and even softer alloys. Gricks are ambush hunters, lying motionless in tight crevices until prey passes close, then striking with sudden speed. Though solitary and rarely seen, signs of grick activity, such as shredded equipment or the remains of smaller tunnel fauna, are a clear warning for survey teams to proceed with extreme caution.
Roper
Ropers are master ambush predators, resembling stalagmites or rough stone outcroppings in deep tunnels. They remain perfectly still until prey approaches, then lash out with strong, sticky tendrils to drag victims close and devour them with a powerful maw. Ropers are highly intelligent and patient, making them especially dangerous in abandoned or little-used shafts. Teams should avoid areas with unusual rock formations, keep a safe distance, and travel in groups. Regular biosurveys and vigilance are key to preventing roper attacks.
Aberrant and Ooze Species
Gray Ooze
Gray oozes are slow-moving, acidic slimes commonly found in contaminated tunnels, reactor vaults, and industrial waste sites. They dissolve organic material, soft metals, and sometimes even stone, leaving behind corroded debris and hazardous slicks. Small oozes can incapacitate equipment and injure workers, while larger colonies may block entire passages. Encounters are most common in neglected infrastructure. Regular inspections and prompt removal are essential, as oozes can multiply quickly if allowed to feed on waste or spilled chemicals.
Gibbering Mouther
Gibbering mouthers are rare, amorphous horrors lurking in isolated, polluted tunnels. Their bodies are covered in constantly babbling mouths and rolling eyes, creating a chorus of madness that confuses and panics prey. Victims are quickly overwhelmed and consumed. Encounters are extremely dangerous, often resulting in psychological trauma or the loss of entire teams. Immediate withdrawal is mandatory at the first sign of mouther babble or residue. All affected areas must be quarantined and reported to upper management.
Slime Mold
Slime molds are sprawling, mobile colonies that infest abandoned infrastructure, waste chutes, and water reclamation cisterns. They feed on organic waste and can dissolve softer metals, sometimes encroaching on operational spaces. Slime molds spread rapidly if unchecked, blocking tunnels and damaging equipment. Early detection and removal are vital; established colonies require antifungal agents and environmental control. Teams should log all sightings, avoid direct contact, and monitor for rapid regrowth in areas previously cleared of slime mold.
Conclusion and Recommendations
The native macrofauna of Erebus, while seldom encountered, should never be underestimated. Each species demonstrates specialization for survival in low-resource, high-risk environments, frequently resulting in exceptional lethality. Vitatech recommends strict adherence to survey protocols, ongoing habitat monitoring, and immediate reporting of any signs of animal activity. All field personnel must be briefed on first-response containment and emergency evacuation in the event of hostile encounters. Ongoing research into these species’ unique adaptations may yield valuable biotechnological insights if studied under controlled conditions.
Report Ends