There is a fuzzy looking slug maybe nudibranch on my zoos

[Scatcat]

Should I leave it alone or should I remove it. It is very small and kinda blends in but I see antennas so I know it's a slug of some sort. Is it eating the zoanthius?

 

[Fluff]

It might be. No chance of a pic? Best to remove it while you can either way, til you can determine what it is.

 

[Scatcat]

No, It's way to small for a pic. I thought it was a new zoo it blends right in but then I saw some antennas and I knew it wasn't a new growth.