Ok,
So I'm on vacation and what do I do? I spend most of my time looking at the tank and I was up doing a crab patrol (I have a grollia crab that I need to catch) and I spot this green worm looking thing in my rock. It's kinda flat with a white band at the head. I did a search and I think its a ribbon worm.
Since I don't like to take chances I carefully remove the rock (luckly its on one that I can remove pretty easily) and I take a hammer to it. This thing when stretched out was like 6-7 inches long. I poked it with a spoon and it broke apart. Don't know what it was but its not staying in my reef.
Sorry for the blury picture but its the best I could do.