Star Serpent
From Tardis Wiki, the free Doctor Who reference
Star Serpents were found in cold empty spacelands between distant galaxies. They usually ate nothing but stray neutrinos floating in the vacuum. "Serpent" is misleading as these giant space worms appear to have had very basic living functions.
One swallowed the TARDIS with the Doctor, Amy Pond and Rory Williams still aboard. (DWA: The Star Serpent)
