I purchased a single Utter Chaos Paly about two months ago. It has since added 3 heads to the original frag. All has been well until today. I noticed that the skirts are all hanging down instead of straight out from the center like they have been. They have great color and show no obvious signs of distress. I have no other zoas/palys in the tank to compare to. Is this normal behavior or should I be concerned?