Whales use their blowholes for breathing, it is similar in function to our nostrils. It closes up when the whale submerges but the whale can breathe from it when they surface.
Wales use their blowhole to breathe. Usually the mouth of the wale is still submerged when it is on the surface gathering air. When water and air are seen shooting from the blowhole, that is when the wale is exhaling.
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