Mystery Moss - Identification?

[Will Walker]

Hi all -

I was hiking in the hudson highlands and picked up a small sample of iron-stained gneiss from a swiftly flowing stream bed. There was a very green, almost polyp-like moss clinging to the rocks in the stream and I thought it would be interesting to take one home to place in my fluval edge. You know, aquaculture from your local biome!

Can anyone give me an identity or point me in the right direction to figure out what type of moss this is? It seems pretty happy, has been pearling away for two days under pressurized CO2/dosing, but I'm interested in finding out what kind of moss I've got. It's quite striking and I could see it becoming popular in the hobby if not too hard to care for.