Head to head
Feather Duster Worm vs Christmas Tree Worm
Feather Duster Worm
VS Christmas Tree Worm
Both worms extend a feathery crown to filter food and vanish instantly when threatened, but they build very different homes for themselves.
| Feather Duster Worm | Christmas Tree Worm | |
|---|---|---|
| Scientific name | Sabellidae | Spirobranchus giganteus |
| Tube material | Soft, flexible tube of mucus and sediment | Calcareous tube embedded inside living coral |
| Housing structure | Attached to various hard surfaces | Lives embedded specifically within living coral |
| Crown shape | A single feathery crown | Two distinctive spiral crowns |
| Retreat speed | Withdraws instantly at a passing shadow | Withdraws instantly at a passing shadow |
| Lifespan | Not documented in comparable depth | Can live 10 to 40 years in the same coral head |
| Conservation status | Least Concern | Not Evaluated |
| Habitat | Ocean | Ocean |
Feather Duster Worm vs Christmas Tree Worm: common questions
Which one lives embedded specifically inside living coral?
The Christmas tree worm is the one embedded in coral, its tube gradually encased by the coral's own growth, while the feather duster worm instead attaches its soft tube to a variety of hard surfaces.
Which one has two spiral crowns instead of one feathery crown?
The Christmas tree worm has two distinctive spiral, fir-tree-shaped crowns, while the feather duster worm extends a single feathery crown from its tube.
Do both retreat quickly when disturbed?
Yes, both can withdraw their feeding crowns almost instantly at the first hint of a passing shadow or disturbance, a shared defence despite their very different tube structures.