奇异的雌雄同体动物
奇异的雌雄同体动物在动物王国中，存在一种奇异的雌雄同体现象。所谓的雌雄同体，是指动物从身体中间被一分为二，分成雌性和雄性两半。尽管雌雄同体现象最常见于昆虫和节肢动物（如蜘蛛）身上，但是在更高级动物中也存在此类现象，如甲壳类动物、螃蟹、北美红雀、鸡等。雌雄同体龙虾极为罕见，最早记载应追溯到1730年。
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