Unidentified subterranean species

A subterranean species was native to the planet Ridlay. The species, referred to as "ghosts" by the local inhabitants, lived underground; only journeying to the planet's surface every fifty years during the total eclipse. The creatures were entirely gaseous, but capable of solidifying enough to grab and move solid matter.
==Appearances==
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==Notes and references==
Category:Subterranean creatures
Category:Unidentified creatures