There are a couple tricks for removing anemones. YMMV though. One is to point a small PH at it in order to make it move to the sand or a smaller rock that can easily be removed. Another I've heard of is using an ice cube to rub it's foot with. Sometimes that will get them to let go, but IME it didn't do much. Hopefully someone else can offer a few tips as well. Posting in a regional forum is a great idea.