Which of the following is detrimental to the pearl industry?

Chalina

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Cliona

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Euspongia

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Sycon

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Solution

The correct option is B Cliona
Sponges in the genus Cliona are members of the family Clionaidae. They are efficient excavators of calcareous materials including corals and shells. Cliona has been particularly destructive to pearl oysters because they create holes into the oyster shells to find shelter inside the oysters. Thus, the correct answer is option B.

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