Gyo is a nightmarish horror manga that unleashes grotesque body horror and apocalyptic dread through a bizarre invasion of mechanical-legged sea creatures, following Tadashi and Kaori as Japan is overrun by rotting fish that crawl on metal limbs powered by a mysterious “death stench,” escalating from coastal terror into a full-scale collapse of society where infection, madness, and mutation spiral out of control, unfolding with relentless shock imagery, dark satire, and escalating absurdity that reflect Junji Ito’s fascination with fear, decay, and humanity’s fragile grip on normalcy, delivering an unsettling blend of cosmic horror, grotesque transformation, and social breakdown that lingers long after reading and stands as one of Ito’s most infamous and polarizing works, also known as Gyo manga, GYO, ギョ, Gyo Junji Ito, fish horror manga, body horror manga, apocalyptic horror manga, and Junji Ito classic manga.