In its earliest usage two men would go to the fishing area where one, suited with a life jacket and bearing the baited line would then swim out braving the elements and water placing the baited line in the designated area.
河豚外貌醜陋，它的肝、膽、生殖腺和血液都含有劇毒，生起氣來則全身鼓脹充滿尖刺，沒人敢惹。因為有此法寶，河豚生性遲鈍懶散，水裡遊來一幅悠游自在的閒情，而其他的魚類則避之唯恐不及。