Lin Ya-min of the TFRI's sea conditions research lab, points out that when the cold water comes down from the mainland, the Kuroshio Current which circles around the northeast part of the island brings warm water that intersects with it. The cold and warm currents push and pull against one another, becoming almost like two walls. This traps the fish in groups, creating an excellent fishing ground.
水試所漁況海況研究室林雅民指出，當大陸冷水團下來，從東海岸北上繞來的黑潮暖水支流，兩道潮徑的冷暖水相推擠，就好像兩堵圍牆一樣，將魚群團團圍住，形成良好魚場。