Gyo (ギョ, Fish), fully titled Gyo Ugomeku Bukimi (ギョ うごめく不気味, Fish: The Eerie Wriggle) in Japan, is a horror seinen manga written and illustrated by Junji Ito. Appearing as a serial in the weekly manga magazine Big Comic Spirits from 2001 to 2002. Shogakukan collected the chapters into two bound volumes from February 2002 to May 2002.