Need Id help please

[Fishyj]

Looking to see if this is safe or not. I did have a few corals die recently that we’re doing good.

 

[cpoynter]

Did you pull it out? And if so can you post a picture from above under white light? It’s hard to see in the photos, but it could be a big flatworm, or even a lettuce nudibranch.

 

[WheatToast]

Fleshy limpet. Harmless, beneficial grazer.
https://www.saltybottomreefcompany.com/Fleshy-Limpet_p_71.html

It is a frilly limpet and a harmless algae eater. I have one from KPA rock too.

They are nocturnal. Enjoy the free interesting and unique snail.