Tubifex, also called the sludge worm, or sewage worm, is a species of tubificid segmented worm that inhabits the sediments of lakes and rivers on several continents. It’s one of the primary live foods fed to virtually all freshwater aquatic animals such as fish, frogs, shrimp, snails, salamanders, crabs, crayfish, etc. It is very readily taken by all of them. Tubifex is a perfect food for conditioning and breeding your aquatic animals. It’s recommended to mix them with other live foods to make a varied diet for your fish. Fish love the taste of Tubifex – even the pickiest eaters. This is probably a favourite food of Discus fish. Keep your Tubifex bags in a fridge at +3°…4°C. Uneaten worms will not foul your aquarium, but do feed according to your aquatic animals and aquarium size.