Any ideas what this feeder is

[the new guy]

Any idea what this could be there are others but it appears to be either apart of the coral or in the skin thank you in advance

 

[fishbrain]

Is it a mariculture piece? Looks to be a barnacle or something similar.

 

[the new guy]

Yes it's a mariculture it looks like a large polyp hole but the fan expands and retracts into the coral

 

[Maritimer]

That sounds like classic barnacle behavior.

They're cool cousins of shrimp & crabs, which glue their heads to hard surfaces and spend the rest of their lives kicking food into their mouths with feathery feet.

~Bruce

 

[fishbrain]

Yep just a barnacle. Nothing to worry about.

 

[happyhourhero]

Looks like some bugs on that coral as well.