Can anyone help me figure out what's growing on my Zoa?

[GreyYeti]

W

 

[F i s h y]

Tunicates possibly. Or sponge

 

[GreyYeti]

Tunicates possibly. Or sponge

Thanks, So definitely remove whatever it seems to be right?

 

[Just John]

Yes. If you pick it off with a toothpick or tool, make sure you get 100% of it or it may grow back. I imagine a h2o2 dip would work too. Might want to search on here to make sure. Maybe scrape it off followed by the dip.