Shrimps or crabs empty shell, or is it dead?

Near all crustaceans shed it all, hairs and eye balls, the lot comes out of the old shell as new!
If anything has been broken off, a new one is coiled in that crustacean under where it should be, ready to be a complete new guy.
Some times it takes two sheds to get the full sized leg or what ever back to normal!

They split through the gap between the carapace/head and tail and then hormones are flooded into the water from the mucus used to slide out, sometimes telling predators there is a soft shell to eat somewhere.
If the shedding creature is female. those same hormones tell the guys, she is ready for fertilising.
Most all crustaceans are like land birds, more so chickens, they keep making new eggs, fertilised or not!
With shrimp bar banded shrimp, the adult shells of them are calcium, with the rest make sure there is silica in their diet or one day, that shed will kill them!
Those hormones are why when collecting I find many females with no males, he died defending her shed!