Hoth
From Tardis Wiki, the free Doctor Who reference
The Hoth were a species that lived in the atmospheres of gas giants and had had little contact with humans. They could live for millennia and had dirigible bodies the size of small continents.
History
The Hoth were empathic and originated in the atmospheric oceans of Belannia XII during the first lifetime of the Bel system. They colonised the outer gas giants of the system whilst their species was less than two million years old. (EDA: Beltempest)