Disaster Record: Ultra-Large-Scale Supernatural Plague, designation D671, common names: Two-Headed Disease, Fish Curse Disease, Sea Poison Disease, Kyoto Fish Disease.
Location first discovered: Kyoto, summer of 2005. Spread across the entire island within three months.
Infection targets: This disease spread through bodily fluids, parasites, and parasitized individuals. It was currently limited to Fishmen bloodlines and would actively attack Octopus Race bloodlines, though Free Fishmen were also highly susceptible. Under normal circumstances, humans would not be infected, but several exceptional cases of human parasitization had occurred. Examination confirmed that they were followers of Eight-Clawed who had accepted Eight-Clawed's power.
Infection symptoms: After acquiring a "seed," an "Another Me self-awareness" would gradually hatch within three natural hours. During this process, the host would consume large amounts of food to make up for what was needed. Once the other "soul" matured and the time was right, the new self had a high chance of actively seizing the body. After succeeding, it would imitate the original owner and continue living, while retaining the instinct to spread the disease.
Signs of infection: Various limbs and components would appear on a Fishman's body, including fingers, eyeballs, tentacles, teeth, mouths, and so on, gradually assembling into a new stable structure. Their Soul Network would become highly developed and gradually form a collective consciousness.
Symptoms of deep infection: When the number of infected individuals within a certain area reached a certain threshold, or when infected individuals sensed the danger of being purged again, the infection would enter its fusion stage. They would fuse their minds and bodies, evolve into a Mature Body of the disease, and eliminate the danger.
Disease rating and handling recommendations: There was currently no cure for this disease. Since its primary targets were currently Otherworld Invaders, the authorities had not designated it as a