TUBIFEX WORMS

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

Tubifex 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.

Scientific name: Tubifex tubifex
Higher classification: Tubifex
Phylum: Annelida
Order: Haplotaxids
Rank: Species
Species: T. tubifex

Tubifex worms are capable of thriving in oxygen-poor environments, such as sewage treatment ponds, because they possess a much more efficient manner of assimilating dissolved oxygen than most other organisms. The worms, which generally range in length from 1 to 8.5 centimeters, reside in mud tubes that they create out of a mixture of mud and mucus. However, they often leave their posterior segments outside of the tubes, waving them about and creating a current that enables them to collect any surrounding trace amounts of dissolved oxygen.

As bloodworms, tubifex worms have a relatively high level of hemoglobin and a characteristic bright red color. They are a familiar sight to many aquarium enthusiasts who frequently purchase them as a high-protein food for their favorite fish. The annelids are sold frozen, freeze-dried, or live, though this practice is becoming more rare. Live tubifex worms are not as widely available commercially as they once were due to concerns that they may harbor human pathogens that they acquired in sewage-contaminated waters.

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