Elephant skin Question

I picked up a nice frag of elephant skin yesterday from a LFS and I got a couple of questions about it. For one it has about 4 what look to be mounded wholes in it that has little feathery hands come out of them and they rotate according to the water movement, sometime the full 360 degrees. Its a volluntary movement. Its not from the current itself. They are not feather dusters, they are in the shape of a Japanese hand fan. They look somewhat like the filtering antanae of a Porcellan Crab. Also the LFS was turning it over every day to keep the growth creeping along. It is on about a 4x4 peice of flat rock and has grown over halfway around the other side. There is a couple peices that are sticking up off of the rock though. I was wondering if i could "peel" it off somehow and mount what is on the underside of the rock on a plug. I will try to post a pic tonight.
Ty

 

Heres some pics kinda hard to see but a general idea.


and the new addition tonight! Looks so great in person!

 

Having problems with the image, but they look like christmas worms. After acclimation fragging the small pieces should be fine.

 

They can grow in corals like that? I thought it was a specific coral they where in.?...

 

Its a barnacle, I just found it on the web:Coral Diseases and Parasites
In the ''Invassive Pests" part of this page. Ty though.

 

I have some barnacles growing on one of my acropora. Have not done anything about it yet, I am going to try some super glue gel and see if that works.

Let me know what you use to get rid of them.

TIA

 

It also says they're extremely unlikely to reproduce in captivity.