The bluefin tuna that roam the vast Pacific can be divided into many subpopulations, each with their own migration paths. Migration maps compiled from the international literature by researcher Wu Chi-lun of the Taiwan Fisheries Research Institute show that each year in April, adult bluefin tuna begin to arrive off Taiwan and the Philippines from California.
海洋龐大無邊，太平洋黑鮪分成多個系群，各有自己的遷移路徑，農委會水產試驗所副研究員吳繼倫整理各國資料所繪的黑鮪洄游路徑顯示，每年四月至六月期間，成熟的黑鮪魚陸續由太平洋東部海域的加州海岸一路抵達台灣、菲律賓外海。