The fisheries extension system in India represents a crucial institutional framework for advancing sustainable fisheries development, enhancing productivity and improving the socio-economic well-being of fishers and aquaculture farmers. As one of the fastest-growing sectors within Indian agriculture, fisheries significantly contribute to income generation, employment, export earnings and nutritional security. This article examines the structure and functioning of the extension system, which integrates government agencies, research institutions, universities, Krishi Vigyan Kendras (KVKs), cooperatives and non-governmental organizations to facilitate the transfer of scientific knowledge and improved practices. Key activities include capacity building, training, advisory services and dissemination of technologies related to breeding, feeding, disease management, post-harvest handling and marketing. The increasing use of Information and Communication Technologies (ICTs), mobile-based advisory services and digital platforms has enhanced outreach and service delivery. However, the system continues to face challenges such as limited extension manpower, weak institutional coordination, inadequate reach to remote communities and poor feedback mechanisms. Furthermore, climate change, resource degradation, and market uncertainties demand more adaptive and resilient extension approaches. The study underscores the need for participatory, inclusive and technology-driven strategies, along with strengthened public?private partnerships and policy support, to ensure sustainable growth and long-term resilience of India?s fisheries sector.