On the subject of Blue Linckia longevity, there used to be an undocumented tale about one's handling them with their hands causing their demise. It was said that they couldn't recover after coming in contact with human skin oils. You can spot an old timer collecting one in a shop. You tun the bag inside out, put it over your hand, and pick it up star along with the water you're going to pack it in. Twenty-odd years ago there was only one store in NJ where I would buy one and have it survive a few years. Reef Encounter knew what they were doing.