Hoothi

The Hoothi were fungoid creatures of an unknown origin.

Biology
The Hoothi could exist either as spores or as planet-sized gas spheres able to travel through space. They lived on decaying organic matter.

History
The Hoothi had knowledge of the Time Lords and the Doctor, possibly from a previous encounter.

In the year 2570, the Doctor, Ace, and Bernice Summerfield encountered the Hoothi on Heaven. (NA: Love and War)

Behind the scenes

 * A Sisterhood of Karn member in DW: The Brain of Morbius mentions the Hooti. This was a mistake on the actress' part; it was scripted as Moothi. (DOC: Getting a Head)