Explore the fascinating world of active matter in this 28-minute lecture on "Flocks in Fluids: Simha-Ramaswamy Instability and Beyond" presented by Ananyo Maitra at the International Centre for Theoretical Sciences. Delve into the groundbreaking Simha-Ramaswamy instability and its implications for understanding collective behavior in fluid environments. Learn about the latest developments in active matter research, including applications in granular systems, control theory, and biological processes such as cellular dynamics and animal migration. Gain insights into the nonequilibrium physics driving these complex systems and their relevance to diverse fields from physics to biology. Part of a broader discussion meeting on Active Matter and Beyond, this lecture offers a unique opportunity to explore cutting-edge research in this rapidly evolving field.