What is this?

[PeteFiglebee]

Hello. I have something growing out of my sand in my reef tank. It's seems to be a plant. It is green and tubular. They look like needles sprouting up. What is this?

 

[Delatedlotus]

That is a spike off Sonics back... lol.
No it has to be a plant.. order or add anything new lately?

 

[PeteFiglebee]

I recently added a bubbletip Anenome. This stuff is sprouting pretty close to the rock the Anenome chose to attach to.

 

[Delatedlotus]

Hitch Hiker...? Maybe... I would try to get it under control immediately. You might want to put it your sump till you can figure out what it is. I dont know, but it might be kind of cool. Never have I ever seen that before.. Mangrove tree? maybe.. you might be in the tree business...