Families live in mud-built huts along the Niger River, where fishermen in paddle-powered boats cast nets for catfish and carp.
沿着尼日尔河分布着各式家庭，那里驾着划桨船的渔夫撒网捕捞鲶鱼和鲤鱼。
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Asian carp—including thecommon, black and bighead variety—were brought to the U.S. in the 1970sas live vacuum cleaners meant to remove algae and suspended matter fromponds.