Zhag was a male Tellarite who lived in the 24th century. In the 2370s, he was imprisoned at the Letau prison facility.

In 2375, Zhag was one of several prisoners who managed to escape their holding cells after the prison was damaged by the crash of a Romulan starship. Zhag was killed after being shot by Jem'Hadar soldiers who had entered the facility with orders to kill all its inhabitants. (DS9 novel: Fearful Symmetry)