Tubifex is a cosmopolitan genus of tubificid annelids that inhabit the sediments of lakes, rivers and occasionally sewer lines. At least 13 species of Tubifex have been identified, with the exact number not certain, as the species are not easily distinguishable from each other.

Excess sludge reduction induced by Tubifex tubifex in a recycled sludge reactor
A sediment bioassay using the tubificid oligochaete worm Tubifex tubifex
Salmonid whirling disease: Tubifex tubifex (Müller) identified as the essential oligochaete in the protozoan life cycle
Molecular Phylogeny of Tubificid Oligochaetes with Special Emphasis on Tubifex tubifex (Tubificidae)
Metallothioneins induction and antioxidative response in aquatic worms Tubifex tubifex (Oligochaeta, Tubificidae) exposed to copper
Myxobolus carassii Klokaceva, 1914 also requires an aquatic oligochaete, Tubifex tubifex as an intermediate host in its life cycle.
Persistent infection of Myxobolus cerebralis, the causative agent of salmonid whirling disease, in Tubifex tubifex.
Distribution and Abundance of the Aquatic Oligochaete Host Tubifex tubifex for the Salmonid Whirling Disease Parasite Myxobolus cere...
Effects of water temperature and substrate type on spore production and release in eastern Tubifex tubifex worms infected with Myxob...
Development of Myxobolus portucalensis Saraiva & Molnár, 1990 (Myxosporea: Myxobolidae) in the oligochaete Tubifex tubifex (Müller)