“无论是什么原因，它们确实一直在南极大陆上生活，”凯斯在一份声明中说。

"For whatever reason, they were still hanging out on the Antarctic continent," Case said in a statement.

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因此，在不能适应寒冷的肉食动物如海蟹、鲨鱼的关注下，南极大陆上的动物已经自由自在了几百万年。

As a consequence, the animals of the Antarctic continental shelf have been free for millions of years from the attentions of predators, such as crabs and sharks, that cannot cope with the cold.

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