This Faculty Early Career Development Program (CAREER) award will support research to create tiny soft robots capable of demonstrating agile navigation and dexterous object handling in fluids. Mesoscale (i.e., millimeter-to-centimeter-scale) soft robots can provide unique advantages in hard-to-reach biological and natural fluidic environments. However, they currently lack locomotion, agility, and object manipulation capabilities comparable to those of mesoscale marine organisms, limiting their effectiveness in dynamic flows. This project will incorporate versatile fluid manipulation strategies, such as based on changing mechanical properties, into the design and control of mesoscale robots to address this gap. The resulting miniature actuators, physically complex robots, and data-driven control strategies will advance mesoscale robotics for broad applications in conditions that are challenging for humans or larger robots. Examples include exploring, monitoring, and sampling intricate coral reefs, mangroves, and densely stocked aquaculture, as well as improving access to hard-to-reach parts of the human body for timely medical diagnosis and treatment. Besides research, this award will support widespread engagement in miniature robotics through a knowledge-sharing website, project- and theory-integrated college courses, undergraduate research internships, and exhibitions at local museums. Achieving locomotion, agility, and object manipulation capabilities that millimeter-to-centimeter-scale marine organisms demonstrate remains a major challenge for mesoscale robots, due to limited understanding, realization, and utilization of interaction modes between robots and surrounding fluids in intermediate flow regimes. To overcome this challenge, this project will develop and systematically investigate versatile fluid manipulation strategies. Specifically, this project focuses on four thrusts: (1) enable active modulation of multimodal motion modes and mechanical propertie