funky blue plant?

[LOVEYOURPOOLGUY]

hows it going

I recently started "cycling" my aquarium about three weeks ago, i did have it running w/live rock in it for about 2 months though. However I just put fish in three weeks ago. My question is this, my live rock is coming along nicely w/ what appears to be Caulerpa, but there is this neat looking "plant" on the rocks as well. It is purple or blue in color and when disturbed (by disturbed i mean when i brush the glass or go near it with the brush)it disappears and reappears seconds later. Can you provide any help? I tried to take a picture but it didnt come out well.

 

[michealprater]

sounds like it could be a tube anenome.

 

[enjoyfish]

might be a feather duster , i found a lot on my live rock . they seem to be growing , i dont think they get to big . but your L F S might have big ones for sale . get a red light and look in your tank at night , you will see alot more cool little things that hide from bright light

 

[michealprater]

hmmm. ive never seen a purple or blue feather duster, do they exist?

 

[enjoyfish]

maybe