Introduction -- Fish locomotion: biology and robotics of body and fin-based movements -- Wire-driven robot fish -- Design and Control of a Multi-Joint Robot Fish -- Research on the Robotic Fish Propelled by Oscillating Pectoral Fins -- Soft-body robot fish -- iSplash: Realizing Fast Carangiform Swimming to Outperform a Real Fish -- IPMC-Actuated Robotic Fish -- Macro-fiber composite actuated piezoelectric robotic fish -- A Multifunctional Underwater Microrobot for Mother-Son Underwater Robot Systems -- Multiple Autonomous Robotic Fish Collaboration -- Fish-Robot Interactions: Robot Fish in Animal Behavioral Studies. .