I received my green BTA from a friend's mother, who was keeping them under very low lighting (2 watts/gal in a 65 tall). When I got it, its tentacles were very stringy, and she said they'd always been that way. But when he settled down in my tank under higher lighting, the tentacles began to develop bubbled tips, and now the anemone looks much happier in general. I was unders the impression that bubble tip anemones go stringy when they need higher lighting or food. However, mine lived for a year under low light, and its parent has lived that way for three years, so I guess you never know.