Wiggler

['wɪɡlə] or ['wɪglɚ]

(noun.) larva of a mosquito.

(noun.) one who can't stay still (especially a child); 'the toddler was a real wiggler on plane trips'.

Checked by Carlton--From WordNet

(n.) The young, either larva or pupa, of the mosquito; -- called also wiggletail.

Editor: Pasquale