not a fish,, can u ID this for me

[rasnme]

but sure would like to know what it is,, is it a good or bad thing to have with soft corals ?? It's redish tan in color comes up from under my CC and grows up the sides of my tank or on the LR .. I've checked out spagetti worms and it just doesn't look anything like that .... I need help please ID

 

[rasnme]

one more pic of how it starts out and then just grows from there

 

[sandman12]

Its a type of very annoying algea. Check ur phosphates.

 

[asbury030]

If you are talkin about that worm thing in the second pic I have one in my 12 gallon and he hasnt messed with any thing. I think people told me it was a peanut worm or something like that.