Bionic robotic fish

The utility model discloses a bionic robotic fish which comprises a fish head mechanism, a fish body mechanism and a fish tail mechanism, a first active sonar is arranged on the front side of the fishhead mechanism, a second active sonar is arranged on each of the left side and the right side of the fish body mechanism, and the first active sonar and the two second active sonars are arranged in adelta shape; a laser scanner is arranged at the lower part of the fish head mechanism; the fishtail mechanism comprises a fishtail framework, the fishtail framework comprises multiple stages of jointmodules, the output shaft of the previous stage of joint module is fixedly connected with the waterproof driving box of the next stage of joint module through a joint connecting rod, and the output shaft of the last stage of joint module is fixedly connected with a fishtail through a fishtail connecting rod. Three active sonars arranged in a delta shape are adopted, the coverage area is larger, underwater sound can be moni