The National Seminar on Microbial Interactions in Aquatic Systems and Ecological Sustainability (MIASES 2024) is a prestigious academic event organized by the PG & Research Department of Aquaculture and Fishery Microbiology, MES Ponnani College, Kerala. The seminar, scheduled for November 20-21, 2024, brings together eminent scientists, researchers, students, and industry professionals to discuss the latest advancements in microbial interactions within aquatic ecosystems. The central theme of MIASES 2024 focuses on Microbial Interactions in Aquatic Systems and Ecological Sustainability, addressing pressing global concerns about aquatic health, biodiversity, and climate change. The seminar covers three primary sub-themes: Microbial Diversity and Aquatic Ecosystem Functioning Aquatic Ecology, Biodiversity, and Climate Change Fisheries, Aquaculture, and Aquatic Ecosystem Health The event includes keynote addresses by distinguished experts, oral and poster presentations on cutting-edge research, and discussions on sustainable aquaculture, microbial ecology, and conservation strategies. The seminar is organized in collaboration with the American Society for Microbiology (ASM), the Department of Marine Biology, Microbiology, and Biochemistry at CUSAT, and the Association of Fisheries Graduates (AFG). This Book of Abstracts serves as a valuable resource, showcasing innovative research and encouraging collaboration among participants. By fostering discussions on microbial contributions to ecosystem stability and sustainability, MIASES 2024 aims to promote scientific advancements and practical solutions for maintaining healthy aquatic environments​