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Stony Corals at Bluff Island, Sai Kung
Stony Corals at
Bluff Island,Sai Kung

What is stony coral?

  • Corals in order Scleractinia and possess solid calcium carbonate skeleton

  • Usually bear 12 tentacles which are always number in multiples of six

  • Some corals in class Hydrozoa and in sub-class Octocorallia can also deposit hard skeleton, but they have distinctive skeleton structure and number of tentacles

  • Approximately 800 known species of stony corals

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Last Review Date : 22 March 2017