The grey mullet head north, the great grey mullet harbors change location: In the past the grey mullet would move south with the cold water, from Hsinchu to Wuhsi, Wangkung, Taihsi, Anping, Chiating, and Tungkang, swimming right on down to the tip of Taiwan at Hengchun. If they hadn't yet been intercepted, they would spawn at the Chihsing seaside near Hengchun and then depart.
漁場偏北，「烏魚大港」易位以往烏魚是順著冷水南下，從新竹、梧棲、王功、台西、安平、茄定、東港，一直游到恆春，如果沒被捕捉，就在恆春七星岩產卵後離去。