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鲤鱼,鲤形目鲤科动物,鲤科鲤属杂食性动物,原产亚洲,后引进欧洲、北美以及其他地区。鲤鱼身体侧扁而腹部圆,口呈马蹄形,须2对。背鳍基部较长,背鳍和臀鳍均有一根粗壮带锯齿的硬棘。鳞大,上腭两侧各有二须。鲤平时多栖息于底质松软、水草丛生的水体低层,冬季游泳迟缓,在深水底层越冬。鲤的成鱼是以底栖软体动物为主的杂食性鱼类,幼鱼期则以大型浮游动物为主食。亚洲鲤鱼入侵美国疯狂繁殖,密西西比河水生物已崩溃,为防止它们从密西西比河进入五大湖,美政府决定斥资180亿,用25年建堤拦住亚洲鲤鱼。
2023-09-172023-09-17
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