filter feeder inside sps?

[Maxxingout]

Sorry if this is a newb question, but I am still a newb. I noticed that one of my sps corals has a fan type filter constantly going in and out of 1 of my sps corals. I also noticed that my Leptastrea lps has some too. Is this normal?


here's a pic of the lep, you can kind of see the filter fan at the top of the lps.


If it's normal that's pretty cool. If not should I be worried?

 

[Wazzel]

Looks like a barnacle or related critter. Nothing to worry about and not out of the ordinary. I have had them show up on corals or live rock before, never had one make it long term.