Live rock turning brown?

[Jenn_737700]

okay, so diatoms. and they'll go away. Good
and I have about 3, a brownish one which is about an inch and a half, a very small one that looks somewhat hairy, and a lumpy green one. also, while im mentioning everything, I'll say something about the orange and white worm that burrows itself in my sand. Are they the bad kind? or just misunderstood?

[Aquattro]

Probably need some kind of pic on the worm For me, crabs are all good until caught eating something I paid money for