Penal colony (Earth-5875)

Penal colonies are colonial territories, be them planets, moons or space stations used only as correctional facilities for convicts. In penal human colonies, prisoners are expected to labor in mines and industrial facilities for materials. Prison ships are vessels designated to transport prisoners to penal colonies. Phobos, Mars' largest natural satellite, is home to a massive penal colony, while Fiorina 161, in the Neroid system, is home to the Fiorina 161 Class C Work Correctional Unit, a massive prison that exclusively housed men afflicted with double-Y syndrome.

The Covenant also had their own penal colonies, such as the Weeping Shadows of Sorrow, most of which were managed by kig-yar privateers. Some of them were used to detain Unmutual yanme'e, such as was the case with the Covenant occupied former human colony Verge.