Bloodworms are a popular live bait used by anglers, but they can also be used as fish food for pets and aquariums. However, if you are looking for synonyms for bloodworms, there are several options available. One of the most common alternatives is "red worm," which refers to a type of worm that has a bright red color. Another synonym for bloodworms is "midge larvae," which describes the larvae that hatch from aquatic flies. In addition, some people refer to bloodworms as "tubifex worms" or "sludge worms," which are similar types of worms that live in oxygen-poor environments. Regardless of the name, these worms are a versatile and effective bait or food source for fish.