MYTH: Any shark that stops swimming will suffocate and die.
误解十四:停止游泳的鲨鱼都会窒息而死。
You often hear sharks can breathe only when swimming pushes water over their gills.
你经常听说鲨鱼只有在游泳时才能呼吸,因为游起来时水才能从鱼鳃流出。
That's true of a lot of sharks, but many others – like bottom-dwelling nurse sharks – can pump oxygen-rich water over their gills without swimming.
很多鲨鱼都是如此,但也有很多其他鲨鱼——比如住在海底的护士鲨——就算不游泳,富含氧气的水也可以从鱼鳃流出。
All sharks lack swim bladders, however, so if they stop swimming they will sink to the bottom. Luckily a shark's body is incompressible and rapid descents or ascents don't harm them.
但是,所有的鲨鱼都没有鱼鳔,所以如果不游泳的话他们就会沉到海底。幸运的是,鲨鱼的身体不会被压缩,迅速的沉降和上浮都不会伤害到它们。
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