Care guide, husbandry, breeding, disease, sourcing, and tankmate intelligence on Christmas Tree Worm - written by the Fast Aquatics editorial team and cross-verified against vendor records on the live marketplace.
Christmas Tree Worm (Spirobranchus giganteus) is a marine invertebrate kept by aquarists for reef-tank cleanup, biological control of pests, or aesthetic display. Suitable for keepers with 6-12 months of experience and stable water chemistry.
Where Christmas Tree Worm comes from
Christmas Tree Worm (Spirobranchus giganteus) is native to Indo-Pacific reef ecosystems, with wild populations distributed across coral reefs, sandy lagoons, and rocky tide pools. Captive specimens are typically wild-collected; some species are starting to be aquacultured but most Christmas Tree Worm sold today still comes from wild reef collection. Sustainable sourcing matters - look for vendors who can verify their collection practices, and consider aquacultured alternatives when available.
Christmas Tree Worm tank size and setup
Christmas Tree Worm requires a minimum of 30 gallons for healthy adults. The minimum is based on the species' adult size (1.5 inch crown), territorial range, and behavior pattern. Most Christmas Tree Worm sold at small juvenile size will reach full adult size within 12-24 months and the system must be sized to the adult, not the juvenile.
For a Christmas Tree Worm setup: mature reef tank with stable parameters, live rock for cover, sandbed substrate (1-2"), reef-grade lighting if photosynthetic, and a fully-cycled biological filter at least 6 weeks old. Newly-cycled tanks under 6 weeks crash the parameters that Christmas Tree Worm depends on.
Christmas Tree Worm requires standard reef parameters held tightly stable: Temperature: 76-80°F (24-27°C) Specific gravity: 1.025 (refractometer-measured) pH: 8.1-8.4 Alkalinity: 8-9 dKH Calcium: 420-450 ppm Magnesium: 1300-1400 ppm Ammonia + nitrite: Both 0 ppm Nitrate: Under 10 ppm Copper: 0 (lethal to invertebrates)
Christmas Tree Worm is sensitive to copper - never medicate the display tank with copper if Christmas Tree Worm is present. Stable parameters beat perfect parameters.
What Christmas Tree Worm eats
Christmas Tree Worm is a plankton filter feeder. Filter-feeds on suspended plankton and dissolved organics. Target-feed live phytoplankton, rotifers, or commercial reef foods (Reef Roids, Coral Frenzy) 2-3x weekly to ensure adequate nutrition. Feed Christmas Tree Worm appropriately for its size + activity level. Overfeeding is the #1 cause of water-quality crashes in tanks of all sizes.
Christmas Tree Worm tankmates and compatibility
Christmas Tree Worm is generally peaceful and compatible with most reef community species. Avoid keeping with predatory fish that view inverts as food: large wrasses (especially halichoeres + thalassoma), triggerfish, pufferfish, and certain large angelfish. Multiple Christmas Tree Worm can share a tank but compete for food.
Browse care guides for tankmate-compatibility tables for Christmas Tree Worm and similar species.
Christmas Tree Worm adult size and lifespan
Christmas Tree Worm reaches 1.5 inch crown at adulthood with a captive lifespan of 4-10 years with proper care. Many marine inverts molt periodically; provide adequate calcium and a stable parameter regime to support healthy molts.
Can you breed Christmas Tree Worm?
Christmas Tree Worm breeding in captivity ranges from straightforward (some shrimp, snails) to nearly impossible (most starfish, urchins) due to pelagic larval requirements. Captive-bred specimens are increasingly available from sustainable aquaculture facilities; check with vendors before assuming wild-caught origin.
Common Christmas Tree Worm diseases and problems
Christmas Tree Worm is sensitive to copper, ammonia spikes, low oxygen, and rapid parameter swings. NEVER use copper medications in a tank with Christmas Tree Worm. Symptoms of stress: reclusive behavior, color loss, refusal to feed, abnormal molting (incomplete or stuck molts). Most Christmas Tree Worm deaths trace back to acclimation shock or parameter mismatch - drip-acclimate over 45-60 minutes when adding to a new tank.
Where to buy Christmas Tree Worm online
Christmas Tree Worm is sold at LFS (local fish stores), online retailers, and direct from breeders/wholesalers. Pricing varies widely by source, size, and quality:
Browse live Christmas Tree Worm from vetted Fast Aquatics vendors with carrier-tracked overnight shipping (FedEx Priority + UPS Next Day), climate-aware hold logic, and a 4-hour DOA window with photo-evidence claims. Captive-bred or aquacultured specimens cost more upfront but arrive healthier and integrate faster.
Christmas Tree Worm FAQ
How big does Christmas Tree Worm get?
1.5 inch crown at adulthood within 12-24 months.
How long does Christmas Tree Worm live?
4-10 years with proper care.
What is the minimum tank/pond size?
30 gallons, with larger systems strongly recommended.
Is Christmas Tree Worm hard to keep?
Christmas Tree Worm is rated intermediate difficulty.
What does Christmas Tree Worm eat?
Christmas Tree Worm is a plankton filter feeder; appropriate diet matches its natural feeding pattern.
Christmas Tree Worm taxonomy and care recommendations cross-checked against the following authoritative references and our internal vendor + breeder database.