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He is a light green caterpillar that has black eyes.
Wormy was a green worm-like caterpillar with no apparent legs and two black dotted eyes. When SpongeBob and Patrick were pet sitting for Sandy they played games such as hide-and-seek and tag. But over night wormy metamorphosised into a butterfly and scared everyone in Bikini Bottom because they've never seen a butterfly before.
- It's not stated on where Sandy got the caterpillar.
- Despite his name, he is actually a caterpillar.
- Wormy is apparently good at playing Hide-and-Seek.