Some weird tentacle things coming out of rock

Treezer8

Reefing newb
Here's the picture.
Basically looks like a bunch of little arms.
ONLY comes out at night, and whenever any light is on it, it retreats into the rock
It's usually bigger than that, almost twice the size. Not anything like a brittle star

2012-11-29_18-42-08_166.jpg
 
I'm thinking more along the lines of a micro-brittle star.
The tentacles look to thick to be a spaghetti worm to me.
 
It's hard to tell.
I looked at it again later on, and I could actually see small little black specks on the tentacles, like a brittle star might have.

However, I don't think its a spaghetti worm after looking at pictures.
These tentacles are a bit bigger
 
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