I got a tube anemone a while ago. Placed it in the sand bed away from everything. Stayed put for 6 months. Well it moved and attached itself to the rocks. Stung the heck out of an encruster reducing its coverage by half. I am worried it will get bigger or move again and sting something of high value that’s been growing for years. Tried to simply pull it out, nope. It’s fast on the rocks and I don’t want to kill it pulling it too hard. Any ideas?