What is this???

This started off being very small and on a rock at the bottom of my tank. I watched it and it moves extremely slow but it does not stay in one place.  I had not seen it for a few weeks and today it was on a rock at the top of my tank.  It is a bright aqua blue and has grown to maybe 3/8 of an inch.  While I was transferring pictures to the computer it moved off the rock and I have no idea where it is now.  Does anyone know what it is?

 

Are there supposed to be pictures? I don't see any /DesktopModules/ActiveForums/themes/_default//emoticons/sad.gif

 

I am working on it, Im trying photo bucket for the first time so hopefully soon there will be a picture!

 

I am not sure how I did it but I have a picture on here. I did not have to do photo bucket with the other pics I posted in my album on GIRS. I don't understand it but it worked this time. So any ideas on what this might be?

 

no idea i vote Alien.

 

A piece of blue scrubby sponge, THAT grows...hmm

 

Random piece of cheato?

 

It could be tigerpod, I'm not sure if I'm remember right but I do know one of pods has aqua color on it.