What about this?

[Mental1]

Got a bunch as hitchhikers on my Caribbean coral ...



http://reefcentral.com/gallery/data/500/131354mine.jpg

[otiso777]

Cup coral or aiptasia. It looks like it has a skeleton so I'll say it's a cup coral. They're non-photosynthetic and need to be fed.

[Kreeger1]

I think I've seen this pick now on 3 different threads :)
I think your gonna get the same answer everytime, need a better pick and its either Cup coral or aiptasia.
Erik

[Mental1]

It's not aiptasia. I USED to have an aiptasia garden. So I will go with cup coral. Hey -- figured I get an answer somewhere!

[jjmcat]

This would be astrangia.I have a pic in my gallery somehwere.

[Mental1]

I actually finally found it -- it is Hidden Cup Coral or Phyllangia Americana...