Orange sponge growing around Zoas

[Jhangang]

I've got a sponge type thing that showed up around my Zoas colony a couple weeks ago. Someone in a local Facebook group said it's a cling sponge but I can't find that term anywhere online.

Trying to decide if it's something to worry about or not, and if so what to do about.

I cut the string thing off, and the last pic is during the night cycle so you can see it better.

Any ideas?

Thanks a bunch, and I apologize if this is the wrong forum or if it's been posted before. Just point me I. The right direction if this belongs somewhere else.

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[Sugar Magnolia]

It's sponge growth.