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Coco Worm (Protula bispiralis)

Find Coco Worm across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified invertebrate listings before you buy.

Coco Worm
Photo: (c) Siegfried Baesler, all rights reserved, uploaded by Siegfried Baesler
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Where to buy Coco Worm

ReefDock searches the following reef retailers for this invertebrate. Click through to see the live price.

  • Saltwaterfish

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    Search Saltwaterfish
  • Amazon

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    Search Amazon
  • Petco

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About Coco Worm

A tube-dwelling polychaete worm with two prominent, elegant spiral crown filaments (radioles) in cream, orange, or reddish hues. The crowns are used for filter-feeding and fully retract into a white calcareous tube when disturbed.

Key facts

Compatibility
Generally compatible with peaceful reef aquariums. Avoid aggressive fish or invertebrates that may disturb the tube or consume the worm. Best kept in calm zones away from strong predators.
Origin
Indo-Pacific, including the Caribbean, Red Sea, and Indo-West Pacific coral reef systems.
Min tank size
20 gallons
Max Size
4
Appearance Description
A tube-dwelling polychaete worm with two prominent, elegant spiral crown filaments (radioles) in cream, orange, or reddish hues. The crowns are used for filter-feeding and fully retract into a white calcareous tube when disturbed.
Type
Worm
Category
Filter Feeder
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
Diet Details
Filter feeder requiring fine particulate foods such as phytoplankton, zooplankton, and quality marine supplements. Benefits from regular liquid feeding 2–3 times weekly.
Family
Serpulidae
Notes
Photo needed: new livestock catalog expansion entry added on 2026-04-25. Needs stable calcium/alkalinity for tube growth. Photo candidate added via SearchAPI on 2026-04-25 from mosaicmacros.com. Verify species match and usage rights before marking final.
Care Level
Moderate

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell invertebrates directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current invertebrates listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible invertebrate listings — so you can see the conditions a invertebrate was raised in before you buy. Log this invertebrate on Reef Trak.

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