Small-sized bionic machine fish

The present invention relates to a small-type bionic machine fish. It comprises rigid fish head, elastic fish body connected with fish head, imitation fin mechanism, including left and right and pectoral fins and crescent tail fin and power supply device, control device and counterweight block which are placed on the aluminium skeleton in the fish head. It is characterized by that the interior of said fish head is equipped with visual system including video-frequency and audio-frequency sensors, boost up circuit module and voltage-stabilizing circuit module, the mouth portion of said fish head is equipped with a transparent sealed window whose upper portion has 1-2 auxiliary light sources, the transmitting and receiving antennas are respectively placed on the top of fish head and respectively connected with sensors and control device. The visual receiving device, image collection identification module, intelligent movement decision module and control signal transmitting module and placed in the control centre outside of machine fish.