What's blocking this polyp?

[Sierra_Bravo]

Any ideas on what the reddish-brown circular object is that's blocking the polyp on this tort? The frag came in with it; seems as if the tissue is starting to grow around it.

 

[Maritimer]

Not entirely certain, but could be a barnacle or gall crab.

@KJ might have a better handle on it.

~Bruce

 

[tripdad]

It looks like a damaged tip healing. They get covered almost instantly by algae/cyano and the coral will slowly grow over it as it heals. My .02

 

[KJ]

Look like gall crab.

 

[Sierra_Bravo]

Look like gall crab.

Leave it be or do something about it?