It's definitely not fissidens. Actually, I have to agree ozymydias that its two different plants. The stuff on the back right branches looks like peacock or christmas moss, but I am almost certain that the plant on the front branches is mini pellia (riccardia chamedryfolia). If you look underneath the top left pointing branch, you can make out a single frond of it, and the shape is extremely unlike any moss that I know of. A close up would definitely help with a more definitive id though.