What is this invert?

[kzaveri19]

Just saw something weird in my aquarium today. Its a stick with long tentacles coming out of it. Both the stick and the tentacles were not there till 2 days ago.

Is it a pest or critter

 

[Bent]

Vermetid snail?

 

[SeaCucumberFan]

Ok let's see the possibilities:
-Spaghetti worm: Lots of tentacles
-Spionid worm: 2 tentacles
-Vermetid: "Cobwebs"

 

[kzaveri19]

Are any of these bad Should I take it out of the tank

 

[SeaCucumberFan]

Vermetid is bad

 

[Ron Reefman]

I don't think spaghetti worm tubes stand up off the rock like that. Every one I've seen (in the Caribbean) is attached to a rock along it's length and 99% of the time is under the rock with the open end near the edge.

And the curl at the bottom of the tube is typical of the Vermetid snail. Get rid of it.

 

[kzaveri19]

I don't think spaghetti worm tubes stand up off the rock like that. Every one I've seen (in the Caribbean) is attached to a rock along it's length and 99% of the time is under the rock with the open end near the edge.

And the curl at the bottom of the tube is typical of the Vermetid snail. Get rid of it.

Trying my best, I scrape a few off the rocks every week. Its a losing battle for me.

 

[Stevarino]

Maybe this link will help. (Figure 10?)

http://reefkeeping.com/issues/2003-05/rs/

 

[Sugar Magnolia]

I'd say spionid. They build tubes like that.