Find the word definition

Wiktionary
tubifex

n. Any member of the genus (taxlink Tubifex genus noshow=1) of tubificid annelids.

Wikipedia
Tubifex

Tubifex is a cosmopolitan genus of tubificid annelids that inhabits 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.

Usage examples of "tubifex".

Ileana would think if she found out what a lump of tubifex worms my poem really was, and what to get her for her birthday.

Nevertheless, the oxygen-scarce water still contained many forms of life: water-lice, tubifex worms and blood worms.