ID these please

[bluemantr]

I found these one of the rock. Could anyone id these for me please.
Thanks

 

[reefiness]

to me they look like they can possibly be fan worms... i have some that are yellow in my tank and they look something like that

 

[seannmelly]

i think they look like a type of polyps mabye zoos?

 

[bluemantr]

I findout they are seaweeds Acetabularia calyculus But i couldnt find any info about them. Anyone has some information about these?
Thanks

 

[bluemantr]

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