two new unknowns

[Lance Fjeseth]

Can someone tell me what these are? They are on a frag next to a mushroom. The one on the top center of the shroom appears to be a feather duster? It disappears in the circular "tube" every so often and has little arms that reach outward in all directions. The other critters are in the upper right. some type of filter feeder? They disappear every so often as well. both are very small. I had to zoom in real tight to get the picture. The one on the right may be 1/16 inch or so. Are they an issue?

 

[ihavecrabs]

Hmm picture is hard to tell.

Tube worm/feather duster sounds about right as you state it disappears into a tube and the top looks like a feather duster. The other one on the right looks like a Xenia; however, xenia doesn't disappear and reappear so that has me thinking it isn't.

 

[Maggie321]

If it pops in an out "grabbing" at the water, my vote is on barnacle.

 

[Lance Fjeseth]

If it pops in an out "grabbing" at the water, my vote is on barnacle.

I will try to get a better picture in the morning. thanks for the comments.

 

[Lance Fjeseth]

I will try to get a better picture in the morning. thanks for the comments.

here are two new pics - notice the "xenia" looking ones have retracted in one photo.

 

[reef lover]

Aptasia and either xenia or anthelia...does it pulse ,open and close, at all?