I had a couple glass anemones off a rock I got from John(Aiptasia) that looked like this (translucent). In fact most of mine were this 'color.' The color of anemone is based on the presence of zooanthallae - different types reflect different colors. When they have little, or expel the zooanthallae they will look translucent like this, so having 'brown' ones vs this one really does not mean too much.
Its rather difficult from the angle of the shot to say for certain, but did come on the same LR as the others that you just picked up? If so I say there is a good chance this is another one.