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Tubifex is a cosmopolitan genus of tubificid Annelids that inhabit the sediments of lakes, rivers and occasionally sewer lines. There are over ten known species of Tubifex, but the number is not certain, as the species are not easily distinguishable from each other.

Food and feeding

Tubifex worms feed on decaying organic matter, detritus, vegetable matter which commonly available in segment drains.


Tubifex worms are hermaphroditic: each individual has both male (testes) and female (ovaries) organs in the same animals. These minute reproductive organs attached to the ventral side of the body wall in the celomic cavity. In mature specimens, the reproductive organs are clearly found on the ventral side of the body.

Copulation and cocoon formation

Although the Tubifex worms are hermaphrodites, the male and female organs become mature at different times; thus self-fertilization is avoided, and cross fertilization is encouraged. Two mature Tubifex worms undergo copulation by joining their ventral and anterior surfaces together with their anterior ends pointing opposite directions. Thus the spermathecal openings of each Tubifex worm be nearer to the male apertures of another worm. The penial setae of one Tubifex worm penetrate into the tissues of other worm and thus the conjugants are held together. At this stage the sperms of one worm are passed into the spermathecae of the other worm.After copulation the Tubifex worm separate and begin...
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