Giant worm (Them!)

The giant worm was actually a mining machine invented and operated by Harley Woods.

Physical appearance
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Personality
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Powers and abilities
It was able to tunnel through solid rock, dissolving the rock as it went.

Scooby-Doo (DC Comics)
Woods was responsible for the giant worm sightings in the area, running his digging machine everywhere to look for silver and uranium. He decided it was useless because it dissolved the rock it tunneled through. The gang persuaded him to use it as an attraction at Wild Wooley's Westland Amusement Park, and it was a great success. (Them!)

Appearances

 * Scooby-Doo! (DC Comics)
 * Them!