Discuss the morphology and geological history of corals.

Corals are marine invertebrates belonging to the phylum Cnidaria and class Anthozoa. They exhibit a diverse range of morphological forms and have a significant geological history. Their morphology and fossil record provide insights into past environments, paleoclimate, and evolutionary trends.

Coral morphology varies depending on species and environmental conditions. Corals are colonial organisms composed of polyps, which are cylindrical, sac-like structures with a central mouth surrounded by tentacles. These polyps secrete calcium carbonate (CaCO₃), forming an external skeleton called the corallite. The accumulation of these skeletons over time creates coral reefs. Coral structures can exhibit different growth forms, including massive (dome-shaped), branching, encrusting, plate-like, and solitary forms. The skeletal structure shows radial symmetry and is characterized by _____ ___ ____ ________ _____ _________ _____ _________ ________.
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