In corals, the coenosarc is the living tissue overlying the stony skeletal material of the coral. It secretes the coenosteum, the layer of skeletal material lying between the corallites (the stony cups in which the polyps sit). The coensarc is composed of mesogloea between two thin layers of epidermis and is continuous with the body wall of the polyps.[1][2] The coenosarc contains the gastrovascular canal system that links the polyps and allow them to share nutrients and symbiotic zooxanthellae.[3]


  1. Ruppert, Edward E.; Fox, Richard, S.; Barnes, Robert D. (2004). Invertebrate Zoology, 7th edition. Cengage Learning. pp. 134–135. ISBN 978-81-315-0104-7.
  2. "Coensarc and coenosteum". Coral Hub. Retrieved 2015-04-23.
  3. "Coral Anatomy and Structure". Coral Reef Conservation Program. NOAA. Retrieved 2015-04-23.
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