As well as the Southern Fishing Grounds east of the Philippines, as the bluefin migrate toward Japan they pass through the Northern Fishing Grounds off Su-ao, which has become second to Tungkang as a bluefin fishing harbor.
目前台灣黑鮪基地除菲律賓東方海域的南方漁場，由於黑鮪往日本遷移途中，必須過境蘇澳外海的北方漁場，蘇澳已成次於東港的黑鮪大港。