I just noticed my red star fish "curled" up in a ball..... turned the light on and he seems to be opening back up... is this normal? do they sleep in a ball? is he in peril?
I have no Idea, I know my feather starfish does that but not sure about the one you have, the feather is a filter feeder. I think you should move your post to the reef section instead of trading, you might get more help there.