Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
A calcium carbonate skeleton refers to the hard structure formed by corals made up of calcium carbonate (CaCO3). It provides support and protection for the soft tissues of corals.
Related terms
Stony Corals: Stony corals are reef-building corals that secrete calcium carbonate skeletons. They are responsible for creating massive structures like barrier reefs or atolls.
Polyps: Polyps are tiny individual organisms that make up a coral colony. They have tentacles and live inside the calcium carbonate skeleton, forming the living part of the coral.
Coral bleaching is the process where corals lose their vibrant colors due to stress, leading to the expulsion of symbiotic algae and potential death if not resolved.