During the Second World War, Kuo Chi-chang was drafted, becoming a solider for Japan fighting in south Pacific battlefields. After the war, he became acquainted with Wu Chen-hui in a POW camp in Singapore. The two young men, both very interested in the fish farming business, pilfered some fry of Japanese tilapia, beginning the tilapia story in Taiwan.
二次大戰期間，郭啟彰獲召入伍，成為南洋戰場上的日本兵，戰後，他在新加坡的戰俘營認識了吳振輝，兩位對養殖漁業充滿興趣的年輕人盜回日人的「帝水魚」魚苗，開啟了吳郭魚在台灣的一頁故事。