Hitchhiker on LR

[Masoch]

Hi folks,

 

I just noticed a hitchhiker on my LR. I'd attach a pic, but there's no way I could get a decent one. I believe it's some kind of coral, and I would really like to keep it going ... I just need some guidance on what it needs.

 

First, it's at the back of my tank on a large piece of LR, quite close to my in-tank W/D. I can only see about half of it, but it looks like a pale pink, fluted wine glass. It opens to about 1 cm across (less than 1/2 inch) during the day and presumably closes just after "sunset" since I can't see it when the lights first go on. Without moving my tank and taking out the W/D, I can't get ya'll any more info.

 

I've looked through my books and the web, but I'm still at a loss. I'm guessing soft coral, but ... maybe also a sponge?

 

Thanks in advance!

[youngandstupid]