glassworm
/ˈɡlæsˌwɜrm/
noun
- A small, transparent worm or larva that lives in water, often used as fishing bait.
- The aquarium fish eagerly ate the glassworms dropped into the tank.
- He bought a container of glassworms to use as bait for trout fishing.
- Glassworms are actually the larvae of certain midges and are nearly see-through.