SINCE 1828
tubifex worm
noun
tu·bi·fex worm
| \ ˈtü-bə-ˌfeks-
, ˈtyü-\
, ˈtyü-\
Definition of tubifex worm
: any of a genus (Tubifex) of slender reddish tubificid worms that live in tubes in fresh or brackish water, are widely used as food for aquarium fish, and serve as a host for the protozoan causing whirling disease in fish
— called also tubifex
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