Caulerpa prolifera ?

Caulerpa prolifera (Forsskål) J.V.Lamouroux, 1809 ?;

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Photo 1 : 4 posts by 1 author. Attachments (1)

Please tell me which plant is here in the picture. 

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When and where? 

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I think taken somewhere in Europe.

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Something like Caulerpa prolifera

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References:

Wikipedia  Algaebase