What the heck is this?

[texdoc77]

So I noticed this bad boy starting to creep out in between my candy cane coral. Have looked up some nuisance type things and cannot find out what it is. The pic is not great but it is a spiral with a little critter living inside. Identification help is appreciated.

Thanks in advance
7/6/15 by texdoc77, on Flickr

7/6/15 by texdoc77, on Flickr


7/6/15 by texdoc77, on Flickr

I think it might be the same thing as the black looking stuff in the middle of my coraline algae on my zooanthid rock here, but IDK...

7/6/15 by texdoc77, on Flickr

 

[tkeracer619]

Black stuff is sponge, can sometimes be invasive, though I think the invasive one is actually a type of hydroid and the black stuff def looks like sponge. Just keep an eye on it.

The fist pick is likely a worm and is probably fine. Need better photos for positive ID.

 

[texdoc77]

Yeah, I had to manually remove some hydroids from a zoanthid rock over the weekend. I think you are right on as far as the worm goes, it looks like a cylindrical spiral (conch) with a little critter sticking out the end from time to time. Just want to make sure it is not some kind of nuisance.

 

[cloak]

That might be a Vermetid snail in the first three pictures.

http://www.reefkeeping.com/issues/2005-01/rs/index.php

 

[texdoc77]

cloak - it is indeed a vermetid snail, thanks for the ID. Now to get rid of the little guys...