they have proliferated. Virtually exterminated the local fish stocks... 繁殖数量却已大大增长 几乎迫使本地鱼类灭绝

287. and is detected.
     被捕食者察觉
288. A monstrous Wels catfish.
     一条巨大的六须鲶鱼
289. Introduced here just 40 years ago,
     虽然才被引入此地四十年
290. they have proliferated. Virtually exterminated the local fish stocks...
     繁殖数量却已大大增长 几乎迫使本地鱼类灭绝
291. And they've now developed a taste for pigeon.
     现在它们将猎食对象转向了鸽子
292. Their eyesight is poor,
     由于视力微弱
293. so they use their barbels to sense the movements of their victims.
     它们依靠触须来探测猎物的动静

来自《行星地球 第二季 第六集 Planet Earth S02E06 城市》第 290 行