Especially, the river's Chinese paddlefish has died out.

尤其是河里的中华白鲟已经灭绝了。

Why couldn't the Chinese paddlefish be raised in captivity?

为什么白鲟不能人工繁殖？

It's a Chinese paddlefish known as "king of all national freshwater fish".

它是一种中国白鲟，被誉为“全国淡水鱼之王”。

Because of overfishing and water pollution, the river's Chinese paddlefish has died out there.

由于过度捕捞和水污染，这条河里的中华鲟已经灭绝了。

"The Chinese paddlefish was so big that it was hard to raise in captivity," Wei said.

“中国白鲟太大了，很难人工养殖。”魏说。

The Chinese paddlefish was about 2 to 3 meters long and could grow longer than 7 meters.

白鲟体长约2到3米，可长至7米以上。

However, it is announced that the Chinese paddlefish living in the Yangtze River has become extinct (灭绝) .

然而，据报道，生活在长江的中国白鲟已经灭绝。

In the past few decades, several animal species have been labeled extinct, including the Chinese paddlefish, Yangtze River dolphin, Pyrenean ibex and western black rhinoceros.

在过去的几十年里，一些动物都被打上了物种灭绝的标签，包括中华鲟、白鳍豚、比利牛斯山羊和西方黑犀牛。