A) Physalia
B) Aurelia
C) Corallium
D) Halistemma
Correct Answer: C
Solution :
Coral animals or corals are marine, mostly colonial, polyploid coelenterate, living in a secreted calcareous skeleton (made up of\[CaC{{O}_{3}}\]) of their own. .e.g., Corallium (precious red coral) is used in jewellery. Tubipora (organ pipe coral) etc.
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