Star Trek: 10 Species That Can Survive The Vacuum Of Space

10. Zetarians

Native to the planet Zetar, the Zetarians were once like any other humanoid species. However, whilst humans sought to leave their planet in the name of exploration, the Zetarians were instead motivated by desperation. Hoping to escape their dying planet, the final few hundred Zetarians' plans at departure were cut short by a final cataclysm.

Instead of dying, the doomed humanoids instead found their consciousness shed from physical form, and existed as non-corporeal beings able to explore the galaxy at warp speeds beyond the limitations of their flesh. Such an existence, however, was not one they relished, and the Zetarians began to seek out compatible humanoids which they could possess, living out their lives whilst their hosts became trapped in their own body.

Using their proclivity to a vacuum against them, Scotty & McCoy are able to use the Enterprise's pressure chamber to drive off the hostile entities, but too late for the thousands of species left devastated in their wake