Ball corallimorphs?

[Candi]

I was wondering if anyone has any info on these? I don't have any photos to share as my larger ones are in the back of my tank and under a small cave... however I just noticed today that I have at least 2 more growing on the side bottom rocks (can try to photograph these tomorrow)

I know one I've had awhile, its about quarter sized right now. Color wise it's hard to tell since they are mostly in dark areas but the balls look white mostly, maybe a hint of color to them.

My concern is that this is my nano tank, and houses a small yellow clown goby and a green banded goby, I've read the orange ball corallimorphs can eat fish/inverts... do I need to worry about whatever type are in my tank?