IME when an anemone is happy you'll know it, bubbles or not. I've found that every time I acclimate a new bta it bubbles up but as it starts to feel more comfortable it goes boner tentacle and sprouts out. This guy was bubbled up when I had him in my tank in the acclimation box on the sand bed but as soon as I placed him in rock work he went longer tentacle but still looks great. The bubble look is awesome but difficult to achieve in most tanks especially due to higher flow.