Sabellida Spionida Terebellida Canalipalpata, also known as bristle-footed annelids or fan-head worms, is an order of polychaete worms, with 31 families in it including the suborder Sabellida (families Serpulidae (tubeworms) and Sabellidae (fanworms and feather duster worms) and the Alvinellidae, a family of deep-sea worms associated with hydrothermal vents.

These cilia are used to transport food particles to the mouth.

However, the cilia and grooves have been lost in the Siboglinidae family.

[2] The earliest known member of the Canalipalpata is Terebellites franklini, which was found in the Clouds Rapids Formation of Newfoundland, and dates from the mid Cambrian (St David's series).

[tone] Fanworms and Christmas tree worms (a type of serpulid) are recommended as species for beginners to keep in a marine aquarium.