Nile tilapia Oreochromis niloticus is one of the most important cultured and exported fish in Thailand. It is commonly consumed as whole fish or as fillets. However, the short shelf-life is a limiting factor for these perishable flesh fish. Therefore, effective methods have been applied to preserve and prolong the shelf-life of fish. Nowadays, natural preservatives such as plant extracts and natural herbs have also been investigated to extend the shelf life of fish Plant extracts which comprise a great diversity of compounds, such as phenolic acids, flavonoids, lignans and stilbenes was found and attracted attention due to its enzyme inhibition, antiviral, antioxidant and antimicrobial activities
because of their safe and good preservative properties. Plant extracts such as chaplu and rang chuet are complex mixtures They are the important dietary spices and herbs in Thai food and traditional medicine, which have been studied to provide good antimicrobial and antioxidant activity. Although, plant extract could prevent microbial and chemical changes of fish, but the information is limited on the quality changes of tilapia treated with chaplu, mulberry and rang chuet. Thus, the objective of the present study was to investigate the effects of plant extract treatment on the quality changes of tilapia fillets during refrigerated storage.