1. Bloodworms, the larvae of the non-biting midge fly, are appreciated by a majority of aquatic pets, be it as a supplemental food or the main diet.

2. Blood worm or Bloodworm is an ambiguous term and can refer to: The larvae of a non-biting midge (Family Chironomidae) containing hemoglobin The polychaete Glycera, often used for fishing bait Species of the Polychaeta subclass Scolecida.