Mantis shrimp is one of the crustaceans that has a physical shape resembling a praying mantis (manthis), in the processing process it will produce waste in the form of carapace and heads which have the potential to be utilized, one of which is the manufacture of chitosan. In general, the purpose of this study is to obtain the potential of chitosan carapace of mantis shrimp (Harpiosquilla r…