S. Ayyappan, born in 1954 in India, is a renowned Indian fisheries scientist and administrator. He has made significant contributions to the field of fisheries and aquaculture through his research and leadership roles. Ayyappan has held prominent positions in various governmental and scientific organizations, notably serving as the Director General of the Indian Council of Agricultural Research (ICAR). His work has helped advance sustainable practices and development in fisheries and aquaculture sectors across India.