To provide a cultivation method for enhancing the aesthetic value of coral reef corals utilizing fusion by growth of coral reef corals.SOLUTION: Reef-forming coral fragments 1 of clones folded from the same group formed in close proximity to each other are fused with each other by growth. By utilizing the property that coral fragments 1 of this adjacent clones fuse each other by growth, chained reef coral fragments 1 formed into an arbitrary shape such as a circle are drooped and cultivated, whereby coral like a lease shape You can create products.(FIG.
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