Fish waste refers to the byproducts generated during the processing of fish, including bones, scales, and internal organs. This waste is often discarded, but it can also be repurposed for various uses, such as animal feed, fertilizers, and even biofuels. In aquaculture, managing fish waste is crucial for maintaining water quality and preventing pollution. Techniques like composting and anaerobic digestion can help convert fish waste into valuable resources, promoting sustainability in the fishing industry and reducing environmental impact.