Christmas Tree Worm
| Name: | Christmas Tree Worm |
| Scientific Name: | Spirobranchus giganteus |
| Family: | Calcareous Tube Worms |
| Taxonomic: | Serpulidae |
| ID Group: | Worms |
| Size: | up to 1.6 in. |
| Depth Range: | On the reef (10 – 60 ft.) |
| Sightings: | Seen many times |
This Worm has two spiral crowns made of feather-like bristles that can be white or bright shades of purple, yellow, or orange. A double-horned lid sits between these crowns, and a hard, chalky tube fastens it to coral.
The Christmas Tree Worm is often found on hard corals and retracts its crowns quickly when disturbed.