To make the most of their brief time on the surface, they begin expelling air on the way up, which creates their distinctive waterspout.
又由於噴孔暴露在空氣中的時間很短，為了把握時間，它在浮升水面前就得開始吐氣，如果吐氣的力量大於海水的壓力，它就會將夾著海水、油氣的水柱噴出來。