Bubble feeding is a well known way for whales to freak out their food; so is lobtailing.

众所周知，气泡喂食是鲸鱼惊吓食物的一种方式。抛尾也是如此。

It would slam its flukes down on the surface of the water--lobtailing, as it is known--then dive and swim round emitting a cloud of bubbles.

它会用尾鳍猛击水面——俗称“抛尾”——然后潜入水中并游动，喷出一团气泡。