Looks like Aiptasia it to me.
By the way, nice score on the other hitchhikers.

Thats kinda what I thought it was but I also thought that it might be a rock anemone becasue this guy had a few of those in his tank. They were kinda cool they had nice patterns on them.

Tank looks really good. Your off to a great start. Did you get that red halymenia or whatever that macro algae is from Kelly? If so it came from my tanks.
I leave it in the display too. It kind of adds a nice bit of color.

+1 Aiptasia but otherwise great hitch hikers!

Actually I got the red algae from the guy who I got the rock from. Kelly didnt have any. Unfortunately there are at least 3 of those anemones and 2 or 3 other anemones that i think are rock anemones they have thicker tentacles and pretty paatterns on them. I was thinking of eventually getting some berghia nudibranches or some other creature who eats the aiptasia.

You can try peppermint shrimps to control the aiptasia. As for berghia nudibranches thats all they will eat, once all the aiptasia are gone they will die, plus there are poor shippers.

Nudibranches
 

guess I wont get one of them, didn,t realize they would not eat anything else.

Yay!! more pics!!
http://i4.photobucket.com/albums/y13...lonreef008.jpg
I have my rocks stacked up now, I will be getting 15 more lbs.
http://i4.photobucket.com/albums/y13...lonreef010.jpg
The mushrooms are growing well!
http://i4.photobucket.com/albums/y13...lonreef011.jpg
I really like these green shrooms!!
http://i4.photobucket.com/albums/y13...lonreef009.jpg
The fuge up and running! Everything is growing well in therer I have a grow lamp over it!!lol!! I even have some frags in there!

I also have a hairy mushroom in the tank but I forgot to take a picture of it! lol!

Definitely looks like it to me.

EDIT: LOL, Guess I should learn to read the whole thread first, lol. I just noticed all the replies:mrgreen:

I like your rock work, tank is off to a good start.