Beautiful animal, but if you find one, I would not suggest buying it.
I had one that looked very similar but a deeper, almost maroon red.
Thought it would live in my tank because I had a different feather star for nearly a year.
WRONG!
It was heartbreaking to watch the thing lose energy and eventually fall apart over the next 3 months. Meanwhile, my other feather star was not growing and I finally realized it was deteriorating and after nearly a year and a half it died. In fact, I had not succeeded in keeping it alive that long, it just took that long to waste away.