Cacoon in zoas

[Jenn2208]

Found this this morning before they opened. Can anyone ID or tell me if i need to get it out? Thanks

 

[NickFD3S]

kinda looks like a sponge, but that's just my guess.

 

[A. Grandis]

I would guess sponge also.
Try to remove some of it with a tweezers and see what it is.
Perhaps would be a good idea to remove it anyway, if it's making the zoas to close.
I've heard some sponges could irritate or take over the zoas.

Grandis.