Question

Blue coral is

• A. Meandrina
• B. Millepora
• C. Heliopora
• D. Corallium

Answer 1

The correct option is C Heliopora

Blue coral (Heliopora coerulea) is a species of colonial coral. It is the only octocoral known to produce a massive skeleton. This skeleton is formed of aragonite, similar to that of scleractinian. Individual polyps live in tubes within the skeleton and are connected by a thin layer of tissue over the outside of the skeleton. The blue coral is the only extant octocoral with a massive skeleton, which is composed of fibrocrystalline aragonite (calcium carbonate).

So the correct answer is 'Heliopora'.