I'm no expert but the local LFS calls that anemone a long tentacle anemone (Macrodactyla doreensis). Of course, you know how LFSes are :-)
It looks similiar to some photos of Macrodactyla doreensis but I can't find a photo of a green one so who knows.
[ January 07, 2002: Message edited by...
I recently (about 4 days ago) got a colt coral for my 75 gallon tank (been set up about 3 years)and it's acting odd. It will start the day extended and busy and very nice looking. But it ends the day "shrunken" in (I took a photo of it in sunken mode). Is that normal behaviour for a colt coral...