I really hate to post this, but I think your anemone is dead or soon to be that way. In looking at the second picture, it looks like it has expelled it's insides. It might recover, but I's say that is unlikely.
Before you toss it, look to see if you see any thing that looks like "smoke" coming out of it, This usually means it's decaying from the inside. You can also git it the smell test. A healthy anemone will smell bad, but a dead one will really smell rank and foul. In either case, discard the anemone.