Does anyone know what this is?

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Godfried Van Moorsel

Hi Torvald

This looks like the egg mass of a polychaete. In the Netherlands we find similar egg masses in spring, deposited by Phyllodoce mucosa. I include an underwater photo of these worms in the process of producing such an egg mass.

Torvald Blikra Egeland

Hi Godfried

Thank you so much for your answer and the wonderful picture.

All the best,

Torvald