Is my emerald molting or dying

My emerald crab has been literally laying around doin very little like this and is very pail in colour. Is he molting or dying?

 

my personal opinion-dying. crabs usually try to stay hidden when they moult because they are very vulnerable to predators when they are all soft and squishy. and from my own experience with emeralds, they dont like to be out in the open that much specially in the light. but you never know, he might not know that. if he is still alive then leave him be and see what happens. he looks pretty big though. i think you might find he starts eating the wrong stuff pretty soon and you will want to remove him. you might get lucky though

 

Which was it?

 

It turns out he was old and died. But I also think he knew he was the biggest and toughest one in there as he never really hid at all. He came our lots. And thank you all for the input.