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The Greenland shark is a type of shark that lives in the Atlantic and Arctic oceans.
格陵兰鲨是一种生活在大西洋和北冰洋的鲨鱼。
Greenland sharks are known for their long lifespans, which scientists estimate to be between 200 and 500 years.
格陵兰鲨以寿命长而闻名。科学家们估计其寿命在200到500年之间。
These estimates come from carbon dating of tissues in the sharks’ eyes.
科学家们使用放射性碳定年法对鲨鱼眼睛组织进行研究，从而得出了这一结论。
This makes Greenland sharks the longest-living vertebrates in the world.
这使得格陵兰鲨成为世界上最长寿的脊椎动物。
They are also one of the largest types of fish in the ocean, growing up to 21 feet long.
它们也是海洋中最大的鱼类之一，能长到21英尺长。
However, they are difficult to find.
然而，他们很难被找到。
Greenland sharks prefer very deep, cold water, which means that they rarely interact with humans.
格陵兰鲨喜欢非常深、寒冷的水，这意味着它们很少与人类互动。
Still, the population of Greenland sharks is decreasing because of human activity.
尽管如此，由于人类活动，格陵兰鲨的数量正在减少。
Because they grow very slowly, Greenland sharks may take an entire century to reach reproductive maturity.
由于格陵兰鲨生长非常缓慢，它们可能需要整整一个世纪才能发育为性成熟。
This means that they can’t repopulate quickly.
这意味着它们不能迅速繁殖。
They are currently considered a near threatened species.
目前，格陵兰鲨被认定为濒临灭绝物种。
