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为了争夺领地和配偶而变性，这种雌雄同体的鱼你见过没？
还记得隆头鱼报恩的故事吗？80岁老人30年前救了一条濒死的隆头鱼，而隆头鱼为了报恩，跟潜水老人坚持了几十年的友谊，这种鱼你见过吗？
物种科普系列17/86
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