Cero or CERO may refer to:Cero (band), a Japanese pop band from Tokyo (2004–present) Cero (fish), a large food and game fish of the scombroid family, found mainly in the West Indies Computer Entertainment Rating Organization, the organization that rates video games and computer software in Japan USS Cero, more than one United States Navy ship Cero or #0, Spanish TV channel Cero, an attack used by Hollows in the Bleach manga and television series