noun
- a small red freshwater worm that lives in tubes in mud and is commonly used as fish food
Usage: zoology
Examples
- The aquarium store sells frozen tubifex as a nutritious food for tropical fish.
- Tubifex worms are often found in polluted water where they feed on organic matter.
- Many fish breeders prefer tubifex over other live foods for conditioning their breeding stock.
- The red color of tubifex comes from hemoglobin in their blood.
- Tubifex can survive in low-oxygen environments by extending their tails from their tubes.
- Live tubifex should be rinsed thoroughly before feeding to aquarium fish.