bloodworm

noun

1. any of several red or red-blooded annelid worms, especially various earthworms.
2. the freshwater larva of midges.

noun

1. the red wormlike aquatic larva of the midge, Chironomus plumosus, which lives at the bottom of stagnant pools and ditches
2. a freshwater oligochaete tubifex worm
3. any of several small reddish worms used as angling bait