The increasing demand for functional bioactive compounds in the food, pharmaceutical, and agricultural industries has prompted the development of enhanced delivery systems that improve their stability, solubility, and bioavailability. Nanotechnology has emerged as a transformative approach, offering creative answers to these problems by making it possible to create nanoscale delivery systems that enhance the functionality of bioactive compounds. Biopolymers, particularly those derived from marine sources, are becoming popular as excellent nanocarriers due to their biodegradability, biocompatibility, and sustainability. These marine biopolymers, when integrated with nanotechnology, offer enhanced protection against environmental degradation, controlled release mechanisms, and improved absorption in target systems. The applications span across various industries, from functional food fortification to drug delivery and controlled release of agricultural nutrients and pesticides. This approach is crucial for advancing bioactive compound delivery systems and holds significant promise for future innovations in multiple sectors.