GyoGyo.

Gyo (Japanese: ギョ; lit. 'Fish'), fully titled Gyo Ugomeku Bukimi (ギョ うごめく不気味; lit. 'Fish: Ghastly Squirming') in Japan, is a Japanese manga series written and illustrated by Junji Ito, appearing as a serial in the weekly seinen manga magazine Big Comic Spirits from 2001 to 2002. Shogakukan collected the chapters into two bound volumes from February to May 2002. The story revolves around a couple, Tadashi and Kaori, as they fight to survive against a mysterious horde of undead fish with metal legs powered by an odor known as the "death stench".