Id required on two items
 

First item is some growth on my live rock (Fiji if it helps anyone). For the life of me I can't find anything similar to compare it to. I've got 4 of these green growths altogether.

The second item (hard to see and don't mind the broken piece of eggcrate at the base of it) is some type of critter living underneath the rock. It "creates" a column of sand around it, extending out by an inch or so. You might not be able to make it out, but there are two antenae or "feelers" poking out from the top of the column of sand.

Any suggestions or comments are welcome.

The first pic is some sort of macro algae. Had it in my tank for awhile - tang didn't touch the stuff... eventually just got really long and died. No id though, sorry.

The first one is sometimes called "caterpillar weed", it's latin name is Neomeris annulata


Very cool macro algae that unfortunately just comes and goes in many reef tanks, I had it for the first few months but eventually it just fades away (my rabbit also liked to snack on it).

The second I'm not sure of but probably similar to vermitid snail?

Thanks for the quick replies! I'll keep researching your answers.

The first is an algae, neomeris annulata and the second is I believe a spionid worm.
Here are a couple of ID sites that I find comes in handy
http://www.melevsreef.com/id/

http://www.xtalworld.com/Aquarium/hitchfaq.htm

Thank-you Marie!

I have positively identified both items after researching your suggestions and you were absolutely correct on both.