Id these 2 things please.
 

These 2 things started growing in my tank about 2/3 weeks ago. I have not been able to find anything similar from google etc.
I am hoping to ID them , so that I know if I need to get rid of them or not.

The "mushroom" looking thing is growing in a"swirl" , it is soft/rubbery to the touch. It is about 1/2" round.

The other pic is of some sort of green plant.

Sorry for the poor quality pics. I only have a phone cam.

http://i79.photobucket.com/albums/j1...psyca2mjtr.jpg



http://i79.photobucket.com/albums/j1...psyifobodz.jpg


http://i79.photobucket.com/albums/j1...ps8x9vttsv.jpg

Not sure on the first one, but the green plant/algae I think is Halimeda

Thanks. It does appear to be Halimeda. Comes from hawaii. I wonder if it tagged along with my Hawaiian live substrate.

Got some better pictures

http://i79.photobucket.com/albums/j1...psbdarz1jj.jpg




http://i79.photobucket.com/albums/j1...pstpxpmny2.jpg

Yea that other dude is correct on first pic. It's not harmful at all but yet on one of my clients tank its growing on a green poccilopora and killing it a bit. Apparently it uses up a bit of calcium.
The second.....well myself I'd try to kill. Just my opinion. Some people call it a rock anemone but I consider it a pest and lean towards aptasia. Unless your trying to identify that other thing in the pic, I had something similar but it was red and kind of like some sort of bubble algae and can't help you there.

Halimeda is a nuisance. It grows pretty fast and sucks up calcium and carbonates. It's tough to get rid of when you want to.

The second one is not a rock anemone, but I'm not sure what it is. It looks like Lobophora in growth pattern, but maybe it is a sponge. You do know there is an Aiptasia below it though, right?

I looked up Halimeda and researched it on ReefAquaria once Daplatapus ID it. It does use up some calcium and grows fairly quickly. I will watch it and see what happens. It is kinda "pretty" on the rock, but if it grows too quickly, a hefty trim kills it apparently, or so says the ReefAquaria article.

Yes, I do know it is Aptasia. I have 3 or 4 of them and waitng for some Berghias to arrive, or I can use my "Magic" Aptasia wand to get rid of them..


I looked up Lobophora. It looks kind of similar, like you said, but nothing concrete to go by, from any of the pics I found online.


"MadReefer"
It is the other thing I am trying to ID. I do know the other is Aptasia.

Thanks for the responses, I appreciate them.