Spirobranchus giganteus, commonly known as Christmas tree worms, are tube-building polychaete worms belonging to the family Serpulidae.

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Location: Bonaire
Photo credit: © John Anderson / Alamy / Afripics
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Keywords: animal, antilles, bonaire, boneiru, caribbean, christmas, dutch, giganteus, island, leeward, marine, papiamento, polychaete, sea, serpulidae, spirobranchus, tree, tube-building, worm, worms