- You may wish to consult
Gill (disambiguation)for other, similarly-named pages.
Gills were a physiological feature which allowed a creature to breathe underwater.
Careshi developed gills at a certain age, allowing them to live in the oceans of their planet instead of on the land. (PROSE: The Suns of Caresh) Marshmen had gills through which they breathed air. (TV: Full Circle) Silmarillions also had gills, and the Eleventh Doctor, when drowning, hoped that he wouldn't regenerate into 'something with gills', like them. (PROSE: Dark Horizons)
At least one spacesuit in the TARDIS's wardrobe had gills. Thomas Brewster offered it to Evelyn Smythe, not realising the inconvenience until it was pointed out by her. (AUDIO: The Feast of Axos)