T. anomala is a type of shrimp that commonly found in the muddy areas of mangrove along the coast of Selat Panjang. This study aims to investigate the clear zones of the chitosan obtained from that shrimp that is tested against Pseudomonas aeruginosa. Carapace from T. anomala is used as chitosan’s raw material resources. Analysis was carried out at the Integrated Laboratory, Fisheries Micro…