The heavy reliance on petroleum-derived plastics in food packaging has created major environmental problems, notably greenhouse gas emissions and the spread of microplastic pollution. As a sustainable alternative, edible seaweeds, often referred to as ?ocean superfoods,? are gaining attention. These marine resources are naturally rich in proteins (3? 14.5%), polysaccharides, lipids (1?3%), minerals (7?37.5%), vitamins, and other bioactive compounds, making them valuable both as food and as renewable biopolymer sources for post-harvest uses. Key polysaccharides like alginate, carrageenan and agar can be extracted and combined with plasticizers to form biodegradable films using techniques such as casting or extrusion. The resulting films possess favourable mechanical properties (tensile strength ranging from 10.5 to 44 MPa) and can be further enhanced with essential oils to provide antimicrobial and antioxidant functions. These seaweed-derived films are already applied in packaging for fruits, vegetables, dairy, seafood, meat and bakery products, where they help extend shelf life and maintain quality. With their abundance, biodegradability and nutritional benefits, seaweed-based packaging materials represent a sustainable, plastic-free option that supports the principles of a circular economy.