In the large whales, the moisture in their warm breath condenses when it hits the air. Together with a little mucus and
seawater, this water vapor forms the characteristic spout, or blow ( Fig. 9.25 ). The spout can be seen at great distances, and its height and angle can be used to identify the whale ( Fig. 9.25 ). The blue whale, for instance, has a spout some 6 to 12 m (20 to 40 ft) high.
In the large whales, the moisture in their warm breath condenses when it hits the air. Together with a little mucus andseawater, this water vapor forms the characteristic spout, or blow ( Fig. 9.25 ). The spout can be seen at great distances, and its height and angle can be used to identify the whale ( Fig. 9.25 ). The blue whale, for instance, has a spout some 6 to 12 m (20 to 40 ft) high.
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