Nanochitosan-Based Enhancement of Fisheries and Aquaculture: Aligning with Sustainable Development Goal 14 – Life Below Water is an indispensable guide for envisioning an ecologically balanced and prosperous future for aquatic resource management. The book explores the innovative application of nanochitosan in aquatic resource management, delineating the cutting-edge potentials of the novel biopolymer to reshape the landscape of fisheries and aquaculture and align with the ambitions of the United Nations Sustainable Development Goals (Goal 14: Life Below Water). The book focuses on sustainability and showcases nanochitosan's capacity to elevate water quality, bolster aquatic well-being, and revolutionize aquaculture disease control, breeding, detoxification, and feed quality. Through practical applications, interdisciplinary insights, and a strong emphasis on food safety and conservation, readers gain a multifaceted understanding of thefield's advancements, future potential, challenges, and requisite nanochitosan-based techniques. This work navigates complex scientific concepts clearly, catering to a diverse audience, including researchers, practitioners, and students.