Glow worm
From Tardis Wiki, the free Doctor Who reference
Glow worms were capable of bioluminescence. (TV: Thin Ice [+]Loading...["Thin Ice (TV story)"])
The First Doctor compared the lighting in the caves on Vortis to that of glow-worms. (PROSE: The Lost Ones [+]Loading...["The Lost Ones (short story)"])
