spiculae / crystals in slceractinian soft tissue ?

[Hoeksema, B.W.]

Dear All,

This is a forwarded question / request:

> Does anyone know of scleractinian corals that have spiculae/crystal-like
structures inside their tentacles, looking like the ones on the SEM
photographs on the webpage
http://home.hetnet.nl/~ascidians/website/webpagespic.htm ? Could anyone tell
me what these structures are?
>
> many thanks,
> kind regards,
>
> Adriaan
>
> A. Gittenberger
> PhD-student National Natural History Museum Naturalis
> Leiden, The  Netherlands
> email: gittenbergera at naturalis.nnm.nl

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