A device that can timely identify an aquatic animal comprises a camera, a DSP, a storing device, an encoder, two external RAMs, an external FLASH and a liquid crystal display. The camera is connectedwith the DSP arranged behind the storing device via the storing device. The DSP is connected with the encoder, the external RAM, the external FLASH and the liquid crystal display respectively. A wholemachine is arranged in an enclosed shell and can timely locate and trace the aquatic animals. The device that can timely identify the aquatic animal helps a visitor to choose the information of the aquatic animal optionally, thus greatly improving efficiency and achieving the purpose of acquiring the information of aquatic animal species.