I am keeping two RBTAs. My first one is in the same place from I got it 7 months ago. I have another one that I bought 6 months ago and almost every single day since the first day is moving to a different part of my tank. I think that it knows all the spots in the tank. It look very healthy, I think this anemone is going to be moving forever. I think there are two different class of RBTA, the lazy ones and the runners one.