Tentacles coming from my rock.

[Aerosol]

I found these tentacles sticking out of my rock. It's very tiny. The stretched tentacle on the right is roughly a quarter of an inch. It ducks down into the rock when stuff gets near it.

My first thought was aiptasia, but, upon closer inspection, I'm almost certain it's not. It uses the two longer, lighter colored tentacles to feel around, and, I presume, to grab food. The smaller ones don't seem to move. It's also stayed in the same place since I found it.

My second thought was spionid worm, but there's no tube and none of the pictures I see of them show any more than two tentacles.

Any help would be appreciated.

 

[pyithar]

bristle star?

 

[kw22]

it could be a fan worm.

 

[Mcgeezer]

I agree that it's a worm of some sort. If it's causing no concerns, consider it a freebie hitch hiker

 

[Aerosol]

It's not a brittle star or feather duster. I do agree it's a "worm of some sort". I hope it's not a bad worm. I guess all I can do is a keep an eye on it in the meantime.

 

[cloak]

Check this out.

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

 

[mcgyvr]

barnacle

 

[Aerosol]

barnacle

I don't think it's a barnacle, it doesn't have a shell.

Check this out.

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

I just realized in my OP that I was picturing a vermetid snail, but I typed spionid worm. It could be a two-tentacled worm, but none of their pictures, that I've seen, have those little tentacles. I only see them with two long tentacles. It's those little, unmoving tentacles that are making it hard for me to find an ID.

Thanks for all the input.

 

[cloak]

What about this one? (Polychaete - Flabelligeridae)

http://www.lionfishlair.com/hitchhiker/hitchhiker.shtml

 

[Aerosol]

That one looks close. I'm not sure, though. I think I'm just going to keep an eye on it to make sure it doesn't eat my fish. There are too many kinds of worms. Thanks for all the help guys. If it gets big, I'll take another picture and try IDing it again. :thumbsup: