The sea lamprey is an ancient jawless fish.

七鳃鳗是一种没有颚的古老鱼类。

The first is to use barriers and dams to keep adult sea lamprey from reaching spawning habitat.

第一种是使用屏障和水坝来阻止成年七鳃鳗到达产卵的栖息地。

Sea lamprey can tell the difference between warm and cold blooded organisms.

七鳃鳗能分辨出冷血和温血生物的。

Probably the sea lamprey is one of if not the most devastating species to have invaded the Great Lakes.

七鳃鳗可能是入侵五大湖的最具破坏性的物种之一。

The sea lamprey actually swam or hitched a ride into the Great Lakes through the canal system.

七鳃鳗实际上是通过运河系统游泳或搭便车进入五大湖的。

Most sea lamprey would swim very quickly away if they came near a human.

如果接近人类，大多数七鳃鳗会游得很快。

In Lake Huron behind us, there are anywhere from 80 to 150,000 parasitic sea lampreys swimming around right now.

在我们身后的休伦湖，有80万到15万只寄生海七鳃鳗正在游弋。

We are warm-blooded and the fish that sea lamprey feed on are cold blooded.

我们是温血的，海鳗吃的鱼是冷血的。

People in the Great Lakes region simply didn't have the palate for sea lamprey.

五大湖地区的人们根本不喜欢七鳃鳗。

Now interestingly, sea lamprey are considered a delicacy in other parts of the world.

有趣的是，七鳃鳗在世界其他地方被认为是美味佳肴。

Spain and Portugal, you could find sea lamprey on a menu as the high dollar market price item.

在西班牙和葡萄牙，你可以在菜单上找到七鳃鳗以很高的市场价格出售。

The sea lamprey are called the vampire of the Great Lakes because they attach and drink the blood of our native fish species here.

七鳃鳗被称为五大湖的吸血鬼，因为它们附着在五大湖上，吸食五大湖本地鱼类的血液。

So many people ask, " Will a sea lamprey attack me while I'm out swimming in the Great lakes or in one of the streams" ?

很多人问，" 当我在五大湖或溪流中游泳时，会不会有七鳃鳗攻击我？"

When sea lamprey first and great mated the Great Lakes many people suggested, " Have you considered actually fishing for sea lamprey? Maybe people be willing to eat them" .

当七鳃鳗第一次在五大湖交配时，许多人建议说：" 你真的考虑过捕七鳃鳗吗？ 也许人们愿意吃它们。"

Humans have also inadvertently introduced more than 100 non-native and invasive species into the lakes, such as zebra and quagga mussels, and sea lampreys that have decimated some indigenous fish populations.

人类还无意中将 100 多种非本地和入侵物种引入了湖泊，例如斑马和斑驴贻贝，以及导致一些本地鱼类数量锐减的七鳃鳗。