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Image Credit: Yale Peabody Museum of Natural History (CC0 1.0; Public Domain)

Watch a video of a cycliophore here.

Animation: The life cycle of a Symbion pandora, one of only two species described in this small phylum.

Video Credit: Nati Chen (CC BY-NC-SA 3.0) 



Chapter: Ctenophores: Welcome


What makes a cycliophore a cycliophore?

  • Cycliophora is a small and recently discovered phylum of symbiotic animals that live on the mouthparts of lobsters. They were first described in the late 1990s and are one of the smallest and least well-known animal phyla. Cycliophorans are characterized by their small size (less than 0.5 millimeters long) and the presence of a distinctive ring of cilia that surrounds the mouth. They feed on bacteria and other small particles and are believed to play a role in maintaining the health of the lobster's mouthparts. To date, only two species of Cycliophora have been described, and much remains to be learned about the biology and evolution of this unusual group of animals.

Chapter: Ctenophores: Text


Chapter: Cycliophores

Background Information

Total discovered species: 2 species
Distribution: Marine only; on the mouthparts of lobsters

Commonly Associated Terms


Evolutionary History & Adaptation

Coming Soon

Conservation and Threats

Coming Soon

Additional Resources

Coming Soon

Chapter: Ctenophores: List

Chapter Advisors and Contributors

Avatar 85

John Doe
PhD Entomology

Lead Researcher at Bugtopia

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James Doe
MSc Insect Pest Management

Termite Specialist

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Ann Doe
MSc Aquatic Entomology

Entomologist at BugTech

Chapter: Ctenophores: Our Team
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