web on glass?

[jray108]

these web type things have appeared on my glass is it good or bad? and what are they?

 

[Reefing Madness]

 

[Intricateart]

We had a basket starfish that looked just like that.It obviously moved around though.That looks like more of a growth of some sort of sponge or macro algae.

 

[jray108]

One of my sand sifting starfish ate it... So I guess the problem is solved ha.