ID for 3 different algae types in my tank.

[clown-lover]

I have three different looking things in my tank. I know one is a hair algae but I'm posting it just incase.
What do I do to get rid of these? And...will a crab or something eat any of it?
Thanks
Brown hair?

More..

Green plant looking thing..

another..

A stiff green stick looking plant

another shot..

 

[spanko]

Do a search for Bryopsis. A real pest.

 

[clown-lover]

Is that what both of them are? Pictures 3 through 6?
In the tank, the pictures 3 and 4 look very 'free flowing'. They sway back and forth with the water movement. There are many of them all steaming from one section.
The pictures 5 and 6 are of one branch. It is stiff looking, it doesn't sway with the water, and it is a different shade in color than the other kind of algae.
Are they of the same kind or something different? I can try to get another pic of the stick one...if that would help to tell if there is any difference.

 

[spanko]

I am thinking the stick might be a hydroid but let's see what others say.
Go to the first link here;
http://lmgtfy.com/?q=Not+Corals!+But...The+Hydrozoans