Abstract: We concentrated on cooperation & coordination of multi-robofish swimming in this paper. This is a new research field of robofish, on which none has carried out any research works. We worked out a micro-robofish platform with high efficiency and high maneuverability, giving a net algorithm based on AGENT for location and coordination. On this platform, we successfully performed two experiences: one is multi-robofish chasing ball; the other is multi-robofish passing channel with coordination.