Also known as Burrowing Christmas Tree Fan Worm, Burrowing Tree Fan Worm, Calcerous Tube Worm, Coco Worm, Fan Worm, Feather Duster, Feather Duster Worm, Feather Tube Worm, Hard Tube Coco Worm, Indian Tube Worm, Rock Worm, Segmented Sea Worm, Spiral Gilled-tube Worm, Tubeworm.
Found in colonies burrowed into stony corals such as brain coral and Porites corals over lagoons and coral reefs.
They feed on zooplankton.
Width - 4cm
Depth - 0-30m
Segmented worms are extremely mobile and possess strong jaws for hunting and feeding on their prey.
Some worms are covered in hairs for protection scavenging on the sea floor for detritus. While others are delicate fans protected by their self made tubes, which they retreat back into when threatened, these are filter feeders and feed on plankton. Ref: https://en.wikipedia.org/wiki/Spirobranchus_giganteus