The invention belongs to the technical field of aquaculture, and particularly relates to a live fish transfer device used between a culture ship and a live fish transport ship, which comprises a fishsuction pump, a suction inlet of the fish suction pump is connected with a live fish suction hose, the other end of the live fish suction hose is connected with a culture fish box on the culture ship,and an output port of the fish suction pump is connected with a live fish output pipeline; the other end of the live fish output pipeline is connected with a grading device, the grading device is connected with an output pipeline, the other end of the output pipeline is fixedly connected with a relay fish box, the relay fish box is connected with a transfer pipeline, the other end of the transferpipeline is connected with a suction inlet of a small fish suction pump, and an output port of the small fish suction pump is connected with a fish cabin connecting pipeline; and the fish cabin connecting pipeline is connected with a fish cabin on the liver fish transport ship. According to the live fish transfer device, fishes on the culture ship can be classified, small fishes which do not growup are automatically collected into the culture fish box to continue to grow, adult fishes are directly input into the transport ship, and reduction of economic benefits caused by the fact that the large fishes and the small fishes are mixed and transferred to the transport ship is avoided.

本发明属于水产养殖技术领域，尤其为一种用于养殖船和活鱼运输船之间的活鱼转移装置，包括吸鱼泵，吸鱼泵的吸入口连接有活鱼吸入软管，活鱼吸入软管的另一端与养殖船上的养殖鱼箱连接，吸鱼泵的输出口连接有活鱼输出管道，活鱼输出管道的另一端与分级装置连接，分级装置与输出管道连接，输出管道的另一端与中继鱼箱固定连接，中继鱼箱与转移管道连接，转移管道的另一端与小型吸鱼泵的吸入口连接，小型吸鱼泵的输出口连接有鱼舱连接管道，鱼舱连接管道与运输船上的鱼舱进行连接，本装置可将养殖船上的鱼进行分级，将未长成的小鱼自动回收入养殖鱼箱继续发育生长，而成鱼直接被输入运输船，避免大小鱼混杂转移至运输船带来的经济效益的减少。