wiggler

(noun) one who can't stay still (especially a child). Synonyms: wriggler, squirmer. Example: "The toddler was a real wiggler on plane trips."

(noun) larva of a mosquito. Synonyms: wriggler.

(noun) terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers. Synonyms: earthworm, angleworm, fishworm, fishing worm, nightwalker, nightcrawler, crawler, dew worm, red worm.