Like all crustaceans, the rock shrimp (Palemon Vulgaris) molts, that is to say, comes out of its skin. It is less extraordinary than the molting of insects where the animal is completely destroyed before being reconstituted into a different animal, but it is still moving because if this molt (every day at first, every week then, then every month...) is not complete, it would end up dying on the spot, dragging its exuvia... (that was to place this beautiful term).