Is this a sponge?

[Afarouki]

White thing growing under candy cane. And is it harmful or harmless?

 

[fishface NJ]

yes it is a sponge. You can leave it if you want. It should not hurt the coral

 

[Afarouki]

yes it is a sponge. You can leave it if you want. It should not hurt the coral

Thanks