Featherduster on Coral?

[seadewrose]

Hi, I have what looks like a tiny black feather duster popping in and out of a leptoseris frag. What is it?

 

[Tahoe61]

Barnacle?

 

[Mebbid]

Looks like a barnacle to me, they generally don't survive long in home aquaria.

 

[seadewrose]

Looks like a barnacle to me, they generally don't survive long in home aquaria.

Barnacle?

Thanks! Looked it up and seems correct. Just wasn't sure if I should dip or not but seems like I can just leave it.