鲨鱼家族存在于地球已有4亿多年,比恐龙的出现还早了一亿多年。它们是海洋生态系统的顶级掠食者,成就了海洋物种的多样性,对维持生态系统平衡起到重要的作用。在过去几十年时间里,每年都有数以千万的鲨鱼被捕杀,人类猎杀鲨鱼的数目高达它们总数的90%。由此导致鲨鱼数量锐减,使得它们已成为当今海洋中最濒危的生物之一。 The shark family exists on Earth for more than 400 million years, more than 100 million years earlier than the advent of dinosaurs. They are top predators of marine ecosystems and have contributed to the diversity of marine species, playing an important role in maintaining ecosystem balance. In the past few decades, tens of millions of sharks have been hunted and killed each year, killing as many as 90% of the total number of sharks. As a result, the number of sharks has plummeted, making them one of the most endangered creatures in the ocean today.