Tube worm

Eudistylia polymorpha , a representative of the Sabellida

In biology, tube worms are various groups of worms that live sessile in self-made tubes in the sea. Mostly these are annelids . These include:

• Featherworms (Sabellidae)
• Tube worms (Serpulidae)
• Sand corals (Sabellariidae)
• Beard worms (Pogonophora)
• Mud tubeworms (Tubificinae)
• Horseshoe worms (Phoronida)