I've been trying and failing to find any info on these guys, but since I posted this thread I started working at my local pet store/lfs and we don't even have the option to order the orange or purple linkias on our order lists from our livestock supplier, we can special order them though. This makes me question the real hardiness variation between the different colors. They may all need the same care. Four years ago this lfs as well as the other one in my area used to have a blue linkia in stock almost every week. Sometimes these would be the same star, but think of how many were sold to uneducated hobbyists. Those of us who are interested in keeping a linkia are concerned for long term health and want to set out to achieve that goal, where as the regular hobbyists that fall into the category of "ooh that's pretty I want it... What is it?" don't even know how to care for it. I think if we were to just treat these stars like we do our LE corals and baby them we can successfully house these magnificent creatures.