ID of possible pest?

[slik419]

Hello, I’m new to reefing and trying to create a mixed reef tank with mostly euphyllia coral. I bought this gold hammer showing what looks like an anemone maybe?? Not really sure what it is but noticed the tentacles of the coral were shorter and not as plump as the rest and this “mouth” with tentacles sweeping in and out. I attached a video.

 

[tbrown]

Looks and sounds like a barnacle.

 

[slik419]

Thank you! I was reading up on it and sure looks like it.