Need some ID

[stix_55]

Hello, can anyone help to identify these for me? Thanks in advance!

What plant is this?

What crab is this? It just left its shell there. I have no idea where it is! Is it safe?

Thanks in advance!

 

[fishermania]

not sure about the crba , but I beleive the plane is maidens Hair.

Here is a link.

http://www.liveaquaria.com/product/prod_Display.cfm?pCatId=659

 

[Tyrosinase]

Looks like a Chia-Pet to me.