A typical instance of RPC-672.

Registered Phenomena Code: 672

Object Class: Alpha-Orange

Hazard Types: Aquatic Hazard, Sentient Hazard, Organic Hazard, Extreme Temperature Hazard

Containment Protocols: All instances of RPC-672 are to be held within Site-008 and kept sealed in a saltwater container measuring 40 by 20 by 25 cm in total. All interaction with RPC-672 is to be done with Level 3 authorization. In the event of a breach, all facility personnel are to undergo a mandatory medical examination and all personal belongings are to be sterilized. Instances of RPC-672 and RPC-672-2 are to be terminated on sight.

Description: RPC-672 is a parasitic organism located on the island of █████████ near Cape Cod, Massachusetts. It is on average 7.5 cm long and resembles the species of isopod recognized as Cymothoa exigua.1 It is currently unknown as to the species' method of reproduction, as dissection has revealed no external nor internal reproductive organs. RPC-672 exhibits tolerance to saltwater, brackish, and freshwater environments, however, it cannot survive temperatures below 2°C.

RPC-672 is primarily docile in nature, as observed in other Cymothoa species, until encountering a potential human host. Attempts to infect other species invariably result in rejection by RPC-672. Upon detection, RPC-672 will attempt to enter the host's mouth by any means necessary. Specimens have been documented entering while the host is unsuspecting or preoccupied with tasks such as eating, drinking and sleeping. How the organism avoids destruction when entering a subject's food is unknown, given that it shows no anomalous properties during both stress testing and complete sterilization carried out by various means.

Once inside the mouth, RPC-672 will inject an acidic solution, hereby designated RPC-672-1, into the subject's tongue, and proceed to repeatedly consume and mutilate the musculature nearby. Over a period of 12 hours, the tongue will be dissolved, with nearby esophageal and mandible tissue having been severely burned away and carved into. An autopsy has revealed the esophagus to be extremely enlarged. It appears that RPC-672-1 has anesthetic properties, as no subjects have reported discomfort or pain during the process. Following this stage, RPC-672 will root itself to the back of the throat and remain there until the death of the host. At this point, RPC-672's anomalous properties begin to manifest.

The host, hereby referred to as RPC-672-2, will begin to slowly lose control of basic linguistic functions over a course of (2) weeks. This loss is exponential, beginning with stuttering and an inability to pronounce and enunciate word combinations, and increases in severity to the point where the subject can only vocalize via bleats and gurgling. During this process, RPC-672-2 will become paranoid and afraid of all human interaction. As of 11/23/17, no examples of RPC-672-2 have been cured successfully. Forced removal of RPC-672 from the host results in immediate cessation of neurological activity.

Up to and following loss of communication, instances of RPC-672-2 display increased demand for food and water. Subsequent feedings result in increased hunger, as well as symptoms typical of those exposed to environments below 15°C. This effect persists for days at a time. It is unknown as to how this occurs. Eventually, instances of RPC-672-2 will continue demanding food but refuse to eat on the suspicion of provided food being poisoned. If force-fed, RPC-672-2 will immediately regurgitate the contents of its stomach. Analysis has shown that the dissolved musculature of the subject is also regurgitated.

Those who approach RPC-672 during the final stages of infection are treated with fear and hostility similar to that of a cornered animal. Upon further approach, RPC-672-2 will pounce on the subject and forcibly claw at the subject's larynx and mandible. Following RPC-672-2's forcible entry into the throat, RPC-672-2 regurgitates copious amounts of RPC-672-1 as well as juvenile instances of RPC-672 which will attempt to infect new hosts. RPC-672-2 will continue to attack and mutilate others until death. It is theorized that RPC-672 utilizes this final stage to gather potential hosts for the newly hatched juvenile instances, as remote observation depicts the RPC-672-2 instance gathering numerous incapacitated host victims into expansive piles for subsequent infection. Juvenile RPC-672 instances have been shown to be incapable of entering host bodies without the aid of RPC-672-2 instances.

RPC-672-2 will eventually expire due to freezing temperatures; this may be amplified starvation due to prior effects. Autopsy of RPC-672-2 shows extreme hypothermia and starvation as the cause of death, with notable amounts of blood and RPC-672-1.

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