Huang Chao-sheng, an associate researcher at the Kaohsiung branch of the TFRI, says that the grey mullet come but once a year, and that according to records, any year where the catch exceeds one million can be considered a "bumper crop."
台灣省水產試驗所高雄分所助理研究員黃朝盛指出，烏魚一年來一次，據歷年的記錄，捕獲量超過百萬尾以上為「豐魚年」。