What’s my urchin carrying?

[kable8]

Hi all,
I’m 6 months into the hobby now but still very much a novice,
I have had an urchin for about 2 or 3 weeks now, it came from my LFS with carrying the odd shell and other bits.
I just noticed that one of the things it’s holding onto looks like an zoanthid head,
I know it’s common for them to pick zoas up.
pictures below.

my knowledge of corals is very limited so prefer to ask the opinion of someone with more experience.
if it’s not a Zoa, any ideas? It closes like a coral with flow changes or light changes.
Thanks for the help

 

[shakacuz]

shell, chaeto, zoanthid

 

[kable8]

shell, chaeto, zoanthid

thanks for the comment.
I thought it was, guess I will try and save it and see if I can get it to grow into something.
Thanks again

 

[Lavey29]

The post should be " What is my urchin not carrying"