A coral ?

[TwoRivers]

This little guy came with the live rock as did another coral looking which I will post a pic of tomorrow when the lights go on

 

[TwoRivers]

Also this little brown guy glows sort if orange under moon light with some bright green in the Center and he moved himself from his rock on the right side to underneath it and then this morning he was all the way over to the left!

 

[Animal-Chin]

Really looks like a mushroom from that picture but if it's moving around a lot it could be an anemone. I've seen rock anemones that look a lot like mushrooms. Sure looks like a mushroom though...

 

[TwoRivers]

It goes smaller as well when the lights go down and out proper curls itself up for the night

 

[Animal-Chin]

Thats a rock anemone

Those are mushrooms...

 

[College fishman]

I say rock anemone

 

[pairenoid]

it looks like a mushroom and sounds like one but since its moving its probably an anemone. My mushrom cant really move at all, but shrinks up and curls at night

 

[54seaweed]

looks like a rock nem to me

 

[Godfrey]

Mushrooms can move around in the water flow I have some that have popped off their rocks an ended up in the sand

 

[Godfrey]

Better pics would help with Id

 

[Sniperhank]

I'm guessing that it is an anemone. I look at it and am reminded of the carpet nem in my tank, but not likely a carpet.

 

[TwoRivers]

It also had a little shoe that separated off from it

 

[Sniperhank]

That's a red hairy mushroom.

 

[Beengirl]

Yep, hairy Mushroom. They can move some, but it's usually a very slow process. They can stretch, leave a tiny new mushroom and then move off to the side. They also move by current flow. It's a nice color mushroom, though. I like it.

 

[TwoRivers]

It has a nice orange neon colour under moonlight with veins of neon green