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The Gold Worm is a Critter. It is a rare, golden recolor of an ordinary Worm, with a 1/150 chance of spawning in place of the ordinary version (when the player breaks stone or dirt piles, or grass).
As with all other golden critters, it can be caught with a Bug Net and sold for 10 . It can also be used as bait, and along with the other golden bait critters has a bait power of 50%, the highest usable value among bait.