Life!!! (updated)

My tank has cycled (there is brown in/on the sand) and that means I'm ready for some life. I got some new live rock (~9lbs), and 4 hermit crabs. Things are coming together nicely, and I can't wait to start putting more life in the tank.

OH YEAH! There is some surprise life on one of my new rocks. I don't know what it is, but it looks VERY much like corral. I've tried to take photos of it, but it is almost clear, and is pretty small. I hope it is able to survive. I'm pretty sure it is still alive because it changes shape from time to time (the stem gets longer and shorter, and that seems to be related to the status of the light in the tank.

This is a photo of what I am assuming is corral. I took a million of them, but it's hard to photograph a clear object this small through glass and water. I've found these on my live rock The day the new rocks were put in. Today I checked... and I may be imagining this... but i think it's getting bigger. I'm positive that the stem grows and shrinks in response to the lighting. Click on this photo for a better look.