I have had my brittle starfish for a little more than a week now and it has been very active and I thought it was doing great until today. He was sitting up against the live rock and missing every leg!!! There are two very little stubbs left and he appears to still be alive... he's still moving. The only other things I have in the tank are two small clownfish, a serpent star, and 10 very small hermit crabs and turbo snails. My heater broke while I was at work today- it was at 86 degrees when I got home- could have caused it? What should I do?!?!?