Besides changes in the condition of the sea, some people believe that the instability in grey mullet production is due to the fact that the environment off the southwest coast of Taiwan has already been altered, so that the grey mullet are no longer willing to come.
海況的變化之外，也有人認為，烏魚產量不穩，是因為台灣西南海岸的環境已經改變，烏魚不願意來了。