A natural product such as chitosan promotes health benefits and extends the shelf life of processed products. Chitosan has been used a food additive due to its antioxidant antimicrobial activities. This study was conducted optimize concentration coating agent on quality Labeo rohita fillets during frozen storage. (CH) solutions were prepared with 0.5 %, 1 2 % (w/v) CH in (v/v) glacial acetic ac...