not sure what this is?

[TauntingBeef]

ok 2 parts here hopefully you can see it.
1. I have a white cobweb looking think on my dead rocks its not stringy its more like sheets.
2. is this Aiptasia?

 

[GimpyFin]

Not sure about #1, #2 looks like a small aiptasia.

 

[johnike]

Looks like a little feather duster/fanworm to me.

 

[Animagus]

A Button polyp is another possibility for #2.

 

[TauntingBeef]

yea john there is a little featherduster in there also I will let it go for awhile longer see if I can get a better pic

 

[TauntingBeef]

another pic of the spiderweb stuff note that this all started before CuC

 

[Animagus]

I'm not exactly sure what that is on the glass, but it looks like it would come off fairly easy with either a Mag-Float or perhaps an algae pad.

 

[TauntingBeef]

it does its just was on my rocks I think my crabs eat it though