Help to ID plants

I have no idea what that is. Are they sure it's aquatic?

yes they are aquatic

SO..... did you get some of it? $30 isn't horrid. ($100 is a little steep though).

This looks like a similar plant that I got from Dawn in Fla. She went collecting wild. It didn't make it in my tank. It was very small.

I remember this plant!

Dr. Tran over at Planted Tank got some from a friend from hong kong. "Cost 100USD for a little wad"
http://www.plantedtank.net/forums/plants/63918-mini-thousand-hand.html

Still an unknown plant. Did they having it growing in carpets over there?

yes they did. It was growing as carpet.

I guess it's a Selaginella, perhaps the same species that is often sold as a cheap potted plant:
http://www.odsitalia.it/storeimgs/selaginella apoda 48.jpg
http://www.agarden.cn/html/hh/guanyezhiwu/caobenguanyezhiwu/20070509/3045.html
I don't know if the name S. apoda used in horticulture is correct, because the real S. apoda, Meadow Spike-moss (not a real moss!), native in the U.S., looks different.
However, it's a terrestrial plant.

The last picture in the series looks like a moss---a very large moss. You can see this moss to the right of the mystery plant in picture #2. The mystery plant is a lot smaller, but definitely is not a moss because it has roots. Whatever it is, it looked as though it had been growing emersed. I wouldn't pay 100 bucks for it!

The large moss in the last picture looks like Rhodobryum roseum, a widespread terrestrial moss in the northern hemisphere:
http://www.hlasek.com/rhodobryum_roseum_aj8776.html
http://calphotos.berkeley.edu/cgi/i...Rhodobryum+roseum&title_tag=Rhodobryum+roseum