I have had a red Linkia Starfish living successfuly in my tank now for at least 6 months. I went away on vacation for 10 days last week. I came home and found that my MP40 power pump had seized up. There had been no flow in the tank other than the return pump for a good period of my vacation (corals are fine though). Now the starfish is not doing well. He is under a rock with a couple of his arms shrivled up at the ends. My question is, does this happen to them from a lack of water movement? Also, I had noticed that he had been recently climbing on a large colony of zoas and some sps corals. Could he have been stung by them?