New Live Rock with Friends

Can you guys have a look at this one for me..
This particular rock had a lot of friends. I dont have a Moon or Red light setup yet for evening viewing so I am not sure how many things are in this rock but this guys comes out 5 minutes after I turn the light on.

I seem to have a few startfish hiding out in this rock as well and they look strange to me.

They are small centered dots with thin worm like arms coming out. I only saw them once when I put the rock in and then they are gone. They seem to stick out their legs at night as I see legs dangling out right as I turn on the light. once the light turns on the legs are gone. They do not crawl around they sit inside the small holes that are in the rocks. They are defintly not worms though..

Anyway thanks for looking

 

That looks like an aptasia anemone, which you will want to do away with before it takes over your tank, and what you described sounds like a micro brittle star, which is beneficial.

 

The pic def looks like an aptasia. You can get some peppermints to eat them or something like Joe's Juice to kill them. You'll want to get rid of it before it starts multiplying. They will sting any coral added and can kill them. Def not a good hitch hiker.

 

Yes, the anemone is a pest. You can nuke it with one of several products. I use pickling lime in a concentrate injected into the body.

The stars sound like micro brittles and those are good little CUC guys.