Its been in the tank for a few months now. My water parameters are good. Some say it may be starvingLoss of spines and color is usually an issue with parameters. Inverts don’t tolerate nitrates and other parameter issues well.
That said, if it was just added to the system and wasn’t acclimated properly it could be fine.
Feed it some seaweed salad seaweed sheets. Get it some Caulerpa.