Can anyone identify this marine creature?

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Fabio Crocetta

eggs, presumably of a muricidae.

Dimitris Poursanidis

It look like egg masses from gastropod (?).

Any other image ?

Deepak Samuel Vijay Kumar

Yes, agree with Dimitris, this is an egg mass of gastropods belonging to family Muricidae.. One example is

http://www.wildsingapore.com/wildfacts/mollusca/gastropoda/muricidae/muricidae.htm

sorry forgot to mention FABIO..

Razy Hoffman

Thank you all, I think that this egg mass are of Murex trapa. This species is very common at Zikim, near the border of Israel and the Gaza Strip.