I have had my octopus for 1 month. I do not know the species. Everything has been fine and it lives only with a pencil type urchin. The octopuses head is about the size of a quarter. This morning when I awoke its arms were weirdly curled up which I've read on the forums is not good. When it began to walk I noticed one leg was "broke off" only half it's normal length. Another leg was only 1/4 of its normal size. The other 6 legs are okay. Its walking is not fluid because of this. I originally thought the urchin did it since I have nothing else in the tank. However, pencil type urchins are supposed to be safe. But then I read about autophagy. Does my octopus have this? If so I am assuming I can do nothing about it and it will die. If there is anything I can do let me know. If it has autophagy what causes this? Does this come with senoscence or is this due to stress only? When people say stress due they mean "nutrient stress/poor diet" or "stress" from tank levels being off? I had been feeding my octopus hermit crabs, ghost shrimp, and guppies. I will discontinue ghost shrimp and guppy feeding since these are freshwater from what I've read on the forums. If it dies I want to make sure I do better job next time. If this happens with age then there's nothing I can do. If it's something I can prevent I would like to know unless it is none of these things. Let me know.