Too much Live Rock?

White starfish?
if it looks like this probally a micro brittle starfish hitchhiker

 

or if it looks like this, it could be a asternia starfish, if so be careful theyre known to eat coraline algae and corals sometimes, been known to happen before!

 

I will upload a picture in a second, I am 80 percent sure its a brittle

 

alright, looking forward to seeing it ! rather a brittle myself ! lol they can make good little cleaners

 

Hopefully this works, I know the picture is not that great.

 

upload it to tiny pic or something, dont have dropbox
TinyPic - Free Image Hosting, Photo Sharing & Video Hosting

 

Hard to say from the picture, ill wait for someone else to jump in, its almost snail like looking, does it always look like that? or sometimes more... 'open and spread' for lack of better words.

 

Okay

 

Its been in the same place for a few hours now, I really cant explain it because it is still so small.
But It only has three arms not five. and its belly has suction cups, pardon my vocab.

 

Cool man, ive got a few of those sea stars in my tank. They're neat.