The star is a
Protoreaster, effectively like a general or chocolate chip star. These stars have a wide variety of color patterns. No need to assume it is dyed. I have never heard this about seastars and frankly I think it would be fatal and or result in exceedingly high cost. But it is possible I suppose.
Anyway, it is definitely, for sure, NOT REEF SAFE. It should be spot fed a wide variety of food, meaty mostly but it would benefit from algae wafers or nori as well.