What is the tube worm phylum?

Tube worms belong to the phylum Annelida, which includes segmented worms. They are primarily found in marine environments and can inhabit various habitats, including deep-sea hydrothermal vents and cold seeps. Tube worms are known for their ability to form protective tubes made from secreted materials and their unique adaptations to extreme conditions, often relying on symbiotic relationships with chemosynthetic bacteria for nutrition.