What's with the shrimp shelling?

Shrimp hulling is a normal physiological phenomenon. In the process of growth, the body shape will continue to increase, and the hard shell will limit its growth, so it is necessary to replace the new shell. The shell of shrimp is mainly composed of chitin, which is not soft and elastic. After the shrimp grows, it needs to take off the outdated hard shell and make a new shell to adapt to its own growth and development. The process of shrimp molting is divided into three stages: before molting, during molting and after molting. Before molting, the feeding behavior and vitality of shrimp decrease, preparing for molting; In molting, shrimp are struggling to get rid of the old shells and gradually complete the formation of new shells; After molting, the shrimp has completed the formation of a new shell, and gradually crusted and resumed feeding behavior.