Floater (Fallout)

Floaters are hostile mutant creatures that likely originated from the FEV-infected flatworms mentioned in the FEV Experiment Disk, and were later further enhanced by The Master's experiments. They are often found in groups with Centaurs. Through producing and storing noxious gases in their floatation bladders, floaters are able to hover above the ground.

The gasses that allow them to float make them highly flammable when attacked with fire or energy weapons. They are completely immune to electrical damage, but have no resistance to fire damage. While they are not very intelligent, they move fast and can be difficult to kill, especially if a group of them surrounds you.

Appearances
Floaters appear in Fallout and Fallout 2. The Art of Fallout 3 book available with the collector's edition of the game includes floater concept art.

Behind the scenes
The floaters were created by Jason D. Anderson. During development of Fallout, this creature was known as the "Sphincter Monster" after Anderson had used a pornographic image for its mouth.