e/Atmospheric beast

Information
has gloss	eng: Atmospheric beasts are hypothetical non-winged organisms which could live within the atmosphere of planets. These could fly (or float) without wings as they weigh less than air. Carl Sagan proposed, albeit offhandedly, that this kind of creature could live in the atmosphere of a gas giant, such as Jupiter. Illustrations of atmospheric beasts have appeared in books, exhibiting speculation as to the exotic forms extraterrestrial life might take. Descriptions of this sort often portray these beings as living balloons, filled with lighter than air gases. In the context of a Jupiter-like planet with a hydrogen atmosphere, such an organism would have to be a hot hydrogen balloon, since there is no other lighter gas.
lexicalization	eng: atmospheric beast
instance of	c/Alleged UFO-related entities