Answer:
Corals are the invertebrate organism of phylum Cnidaria nd kingdom Animalia found in the form of compact colonies. These are found in see bottom that builds reef that inhibits tropical ocean and responsible for the release of calcium carbonate.
Seaweeds are members of the algae group of the Plantae kingdom that found in the sea bottom and anchored with the help of holdfast that grows along seashores. Coral and seaweeds compete for space on the reef on the sea bottom.