ID on this these brown tube things on my Christmas tree rock please.

[sasscuba]

There are 2 brown tube like structures just to left of the blue sponge on the bottom of the rock in the pic on my christmas tree rock. They look like sponges but have a definite opening that retracts if touched and nothing comes out of the tube...any ideas?? The hole in the end is about the size of a pea. Thanks. Click link below picture to see moving arrow pointing to spot. http://i29.photobucket.com/albums/c277/sasscuba/100_0548.jpg

http://s29.photobucket.com/albums/c277/sasscuba/?action=view&current=e3047885.pbr

[jmait769]

Probably Vermetids Snails. Here is a recent thread on them: <a href="http://www.reefcentral.com/forums/showthread.php?s=&threadid=1228212" target="_blank">Dear god! Help with Vermetids (tube snails)</a>

http://i112.photobucket.com/albums/n172/jmait769/Tubes01.jpg

HTH

Jay

[sasscuba]

No definitely not vermetid snails. :rolleyes: I have plenty of those. They are soft and nothing protrudes out of the hole. They look like a sponge.

[mudskipper1]

feather-duster worm I believe. I have them in my tank too. They are harmless.

http://www.seasky.org/reeflife/sea2c.html

The third pic is similar

[sasscuba]

<a href=showthread.php?s=&postid=11589948#post11589948 target=_blank>Originally posted</a> by mudskipper1
feather-duster worm I believe. I have them in my tank too. They are harmless.

http://www.seasky.org/reeflife/sea2c.html

The third pic is similar

Not a feather duster either. :rolleyes: Nothing comes out of tube as stated above.


They are soft and nothing protrudes out of the hole. They look like a sponge.

[dragonladylea]

More than likely a Barnacle. I've had a few in my tank.

[sasscuba]

<a href=showthread.php?s=&postid=11590199#post11590199 target=_blank>Originally posted</a> by dragonladylea
More than likely a Barnacle. I've had a few in my tank.

Isn't the outside tube of a barnacle hard? Cannot find a good link for info. online? These move and retract and feel like a sponge when touched?

[dragonladylea]

This might help,
http://images.google.com/imgres?imgurl=http://www.mesa.edu.au/friends/seashores/images/barnacle.gif&imgrefurl=http://www.mesa.edu.au/friends/seashores/barnacles.html&h=233&w=300&sz=12&tbnid=rfILDf4b_vOnFM:&tbnh=90&tbnw=116&prev=/images%3Fq%3Dbarnacle%26um%3D1&start=2&sa=X&oi=images&ct=image&cd=2

[sasscuba]

<a href=showthread.php?s=&postid=11591068#post11591068 target=_blank>Originally posted</a> by dragonladylea
This might help,
http://images.google.com/imgres?imgurl=http://www.mesa.edu.au/friends/seashores/images/barnacle.gif&imgrefurl=http://www.mesa.edu.au/friends/seashores/barnacles.html&h=233&w=300&sz=12&tbnid=rfILDf4b_vOnFM:&tbnh=90&tbnw=116&prev=/images%3Fq%3Dbarnacle%26um%3D1&start=2&sa=X&oi=images&ct=image&cd=2

I have looked at various times of day and night and have not seen any feeding legs. Wish I could find a live picture that looks like what I have?

[greenbean36191]

It's a tunicate. They're harmless filter feeders.

[sasscuba]

<a href=showthread.php?s=&postid=11591252#post11591252 target=_blank>Originally posted</a> by greenbean36191
It's a tunicate. They're harmless filter feeders.

Thank you. After some research they do appear to be a species of tunicate. Thanks again.


http://www.ucmp.berkeley.edu/chordata/urochordata.gif

http://www.wascuba.org/tunicates/graphics/styelacw.jpg

[sm51498]

sponge or trunicate, hard to tell.

[sasscuba]

It retracts when touched so it is not a sponge I have ever seen.