剧情：
在母鲨鱼的子宫里，小鲨鱼就会猎食手足。而人们越来越多地发现在近海海岸和广阔的海洋里，大白鲨、双髻鲨、鼬鲨等同种类和不同种类的鲨鱼之间都会以大欺小、自相残杀、相互猎食。科学家对鲨鱼的这种行为感到不解。鲨鱼同类相残的行为是自古就有的吗？这种同类相食的行为是出于鲨鱼的本性吗？[展开全部]
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2025
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中国大陆
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