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，例如马和贝，以及导致些本地鱼类减的七鳃鳗。

The quagga, though so plainly barred like a zebra over the body, is without bars on the legs; but Dr. Gray has figured one specimen with very distinct zebra-like bars on the hocks.

虽然像马样明显地在身体上有条纹， 但腿上没有条纹；但是格雷博士发现了个标本， 其飞节上有非常明显的马状条纹。