Encrusted Pods?

[scenicad]

On the side of my rock, there are these encrusted pod things that open and close and a little feather like arm thing shoots out and pulls back in. It's like they're breathing. What are they?

 

[copi]

This sounds like what I've got...

http://www.aquariumadvice.com/viewtopic.php?t=44904

 

[scenicad]

Yeah, we maybe talking about the same thing. I should have checked yours first. Mine are very small too. Like a pencil eraser.

Still no answer as to what they are though.....

 

[copi]

Still no answer as to what they are though.....

We stumped the FINatics!

 

[quarryshark]

Those are called featherduster, a very pretty type of worm. Very neat little creatures.

Mine are very small too. Like a pencil eraser

Those may be Qtip sponges, also pretty cool.
No worries, all signs of good things happening in your systems.

 

[copi]

Those are called featherduster

Mine are definitely not featherdusters (at least not any type of featherduster I've ever seen in a phot). These are completely encrusted in the rock except for the tongue/feather/thing that darts out and back in extremely quickly. There is no "handle" part of the feather duster -- it is flat, flush with the rock, and the extension does not stay extended for more than an instant.

 

[quarryshark]

Ah...I had them too. Unfortunately they died off after a few months. I assume from starvation.
Not 100% sure, but they appeared to be some kind of bivalve. Totally harmless.

 

[reefrunner69]

They are barnacles.

 

[scuba_steve]

yea barnacles and unless you overfeed you tank they will not live long ! they are very hungry little animals

 

[scenicad]

Oh, that's too bad! They're cool. They really make the rock look as if it is actually alive. And their breathing-like movement is pretty soothing to watch. Oh well. I'm sure once I'm able to stock the tank there will be much more soothing things to watch!