ID Please - What is growing in my Zoos?

[jpc763]

I noticed this growth this evening. I took a lights on pic and a lights off pic. Any ideas? It appears sponge like.

Thanks, John

 

[rackyrane]

Looks like a sponge. I have some pink sponge growing just like this on one of my zoo frags. So far, it has not done any harm to the zoo.

 

[jpc763]

That sounds ok. There is a sponge growing on the bottom of this small rock so I guess one could be growing on the top too. Thanks. Any other opinions?

 

[yosemite sam]

Yup, looks like a sponge.

 

[hypertek99]

It's a sponge. I would rub it off cuz it will halt your zoas growth. The white clear kind grows quick and can over take your zoanthids.