The high levels of pollution in Taiwan's rivers has helped the immigrants, for as the local fish go belly-up in the inky waters, the resilient newcomers find themselves in their element.
台灣河川的高度污染，更助外來魚兒一臂之力，當本土魚種在黑水中翻起白肚不支而亡，生命力強韌的外來種則如魚得水，瓜瓞綿延。