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Edible films and coatings are a thin layer of material that used on the surface and between different layers of nutrients. Biopolymers such as polysaccharides, proteins, lipids and their mixtures are used for the preparation of the edible films and coatings. Due to consumers demand for access to high quality materials and their concern because of the problems caused by the use of artificial preservatives, as well as environmental concerns arising from the accumulation of synthetic polymers, the idea of using biodegradable biopolymers as a replacement for the plastic packaging was strong. Efficiency and functional properties of edible films and coatings is dependent on intrinsic properties of ingredients of films, namely, biopolymers, plasticizer and other additives. The useful properties of edible films and coatings are capability of eating and biodegradation of them. Some properties of edible film sand coatings, such as preventing moisture transport and volatiles out of food, selective throughput oxygen and carbon dioxide, delaying surface dehydration, tissue changes, barrier against fat sand oils transports, increase nutritional value, preventing dripping, microbial growth and rancidity, Maintaining the quality of Aquatic and their products against physical damage caused by their transportation, increase the shelf life of them. For industrial use, more scientific studies are needed to determine the mechanisms of the film formation from biopolymers for optimizing their properties. Biodegradable compounds used in this study for aquatic coating and their effects on maintaining the quality of fish and their action mechanism has been investigated.

Keywords: Film, Coating, Biodegradable, aquatic

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