The global fishing industry generates over 20 million tonnes of nutrient-rich waste each year, much of which remains unused despite its high potential in organic farming. Fish waste, rich in nitrogen, phosphorus, minerals, and amino acids, can be converted into effective fertilizers through processes such as emulsion, enzymatic or acid hydrolysis, and composting. These products improve soil fertility, enhance plant growth, and support sustainable crop production while promoting circular resource use. Key challenges including odour, pathogen risks, and nutrient imbalance?can be mitigated through proper processing and regulated application. Fish waste serves as a valuable, eco-friendly substitute for synthetic fertilizers, providing strong potential to enhance sustainable and organic farming.