Although the nation's agricultural output has grown significantly over the past 60 years, this growth has not resulted in higher farmer compensation. Because of this, the extension's focus should shift from simple production led to market-led extension on an end to end basis. The study presents an innovative market-led extension approach to enhance the livelihood security of fish rearers engaged in pisciculture in the flood prone areas of Northern Bihar, India. Bihar, a region vulnerable to seasonal floods, poses significant challenges to the sustainable livelihoods of local communities, particularly fish rearers who heavily rely on floods for their fish farming activities. The market-led extension approach aims to improve the socio-economic conditions of fish rearers by capitalizing on market-oriented strategies that align their pisciculture practices with market demands and trends. The approach fosters a multi-stakeholder collaboration involving fish rearers, government agencies, NGOs, research institutions, and market players to create an enabling environment for sustainable pisciculture practices. Key elements of the market-led extension approach include Market Intelligence and Value Chain Analysis, Skill Enhancement and Capacity Building, Access to Finance and Technology, Strengthening Linkages, Policy Advocacy and Institutional Support. In this regard, the present study were taken with 240 respondents through restructured interview schedule. It was found that more than three -fourth (81.04%) of the respondents had medium to high level of livelihood security, whereas, the overall average livelihood security index value was 0.65.