My Greg wasn't eating, he hadn't had anything for a week. So I put him in the fridge at 7 degrees Celsius. I've been doing daily water changes for the past 4 days with water that I had stored also, and I came to do it today, and I noticed that he wasn't moving at all! All the previous times he had been kicking around a bit, but nothing today. I took him out of the fridge, put him in some fresh water and then let him sit out so the water could cool down, he still hasn't moved! I'm hoping he's not dead, he hasn't gone stiff or anything, but he's not moving at all! I've never had experience with a dead axie so I don't know what I'm looking for! His legs have sort of curled inwards, and he has developed black colouring on his toes since being in the fridge. I don't know what to do, I can't leave him there, can someone please describe to me how to tell if he has passed?