Overview
The Christmas Tree Worm (Spirobranchus giganteus) is a advanced saltwater species known for its multi-color (red, yellow, blue, white spirals) coloration. Lives embedded in coral. Embedded in coral.
Origin & Appearance
Origin: Worldwide tropical.
Colors: Multi-color (Red, Yellow, Blue, White spirals).
Body Shape: Tubeworm (cylindrical). Typical adult dimensions: 4.0 x 0.4 x 0.5.
Sexual Dimorphism: Minimal.
Tank & Water Requirements
| Min Tank Size | 20 gallons |
| Temperature | 75–81°F |
| pH Range | 8.1–8.4 |
| Water Hardness (GH) | dKH 8-12 |
| Bioload | very-high |
| Oxygen Demand | medium |
| Plant Safe | yes |
| Aquarium Position | Embedded in coral |
Behavior & Activity
Sessile coral-embedded filter feeder; spiral radioles extend from coral surface; lightning-fast retraction into tube
Speed: 5/100Aggression: 1/10diurnal
Breeding
Not bred at home
Common Diseases
💊 May lose crown if stressed💊 regrows
Expert Notes
Lives embedded in coral; colorful spirals