The sea horse is a small fish. It likes living in warm water. A sea horse always stands up in the water when it swims.

海马是一种很小的鱼类，它喜欢生活在温暖的水域，当它在水里游的时候它总是站立的姿势。

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It swims farther into the cold of the northern and southern oceans than any other sea turtle, and it deals with the chilly waters in a way unique among reptiles.

其他海龟都不能游到它所能游到的寒冷的北部和南部海域，而且它处理寒冷水域的方式在爬行动物中是独一无二的。

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Though it＇s very small, it swims fast.

尽管它非常小，但它却游得很快。

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The shark is once again a dark spot in the water as it swims from the boat.

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One way round this for a swimming animal is to develop an outlet which allows urea to dissolve directly in the water as it swims, which is what the turtles seem to have done.

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She says she chose Lake Ontario for her swim because it's one of the hardest open-water swims in the world, and she wanted to "accomplish something difficult" for children who fight cancer.

CNN: 14-year-old swims solo across Lake Ontario