What are tubifex and bloodworms?

Tubifex are small, freshwater worms commonly found in sediment-rich environments, often used as live food for fish and other aquatic creatures in aquariums. Bloodworms, on the other hand, are the larval stage of non-biting midge flies, known for their vibrant red color due to hemoglobin, which enables them to thrive in low-oxygen environments. Both are popular in the aquarium trade as nutritious food sources for various aquatic pets.