鱼的进化
鱼的进化是指魚類的演化進程。大约5.3亿年前的寒武纪大爆发期间，就有生物開始逐步朝魚類進化，例如無頜總綱以及海口魚。寒武纪晚期，出现了类似鳗鱼的牙形石以及甲冑魚。泥盆纪时期，鱼类的种类大量增加。
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