new java moss w/ bonus shrimp

I just bought a bunch of java moss from the local LFS--and low and behold--one 1" or so ghost shrimp. So, this being said, I would like to keep the shrimp, and now, where to place the moss. top/floating, bottom anchored, middle anchored???

55Gal
pair of Apistos
pair of mollies
9 rummynose
1 baby bushy nose
3 mystery snails

Thanks

Just to clear this up----Best place for the shrimp and moss--for the shrimps benefit.