Please ID Web-like thing growing...

There is some web like thing growing on the glass of my fuge and looks to be growing on some live rock in the sump aswell. Keep in mind there is no light in the fuge.

see pictures and let me know! Thanks!

 

Sponge.

 

+1 Sponge

 

not familiar with them. something i need to be concerned about? just leave them be?

 

Really, how could that be a sponge? Where is the osculum? It seems to have pointed tips. Looks like a pale/ maybe dying macro algae or something to me.

 

I have them all over my sump I just let them be the pods like to hide around them

 

Sponges take many different forms. I have some yellow in my tank just like what he's showing.

 

I've seen things like this, but I am skeptical that it is a sponge, without a positive ID. I know sponges take a lot of forms and such, so, it could be, it just dosn't seem to fit the general sponge framework. Sponges are just big filters, water in, water out, but I'm not seeing anywhere for the water to go out.

How about a bryzoan? Maybe something on this page?
MarLIN - The Marine Life Information Network

There are probably a half or dozen or so on the above page that are at least vaguely similar for example.

for example:

 

If you click on his 2nd picture, then zoom in, you'll see the tube.

Here. http://en.wikipedia.org/wiki/Calcareous_sponge

 

Maybe, I see what your saying. I'd still like an ID to confirm though ;D