Help identifying anemone or polyp

[Fernando Salo]

Hi everyone, i just encountered this while cleaning the tank. They're on a dead coral, I don't know if those are its polyps or if they are anemones.

The tank is 1 year old. I started with new dry rock.
The only corals I have are the ones I put in the first batch and that went through quarantine. I have not introduced any coral or rock since then.

There are no visible pests except for some hydroids

I'll appreciate any help. Thanks !

 

[Mystersynyster]

Kind of looks like aptasia to me, especially for it to just pop up

 

[EeyoreIsMySpiritAnimal]

I don't see anything that looks like aiptasia.

 

[Fishyfish22]

I might be wrong but they look like strawberry anemones if so they're harmless and pretty cool to look at