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The humpback whale is not so much a gentle giant but a clever killer, herding together shoals of fish for gigantic meals. Until recently, it was unclear how humpbacks hunted fish so successfully, but by getting up close and personal with the giants, it is now known that they have an underwater communication system to detect fish miles away. The whales work as a team, using their powerful voices to 'scream' at the fish and gather them into tight balls which they swallow in giant mouthfuls. New satellite tracking techniques reveal that humpbacks travel on extraordinary ocean journeys to feed and mate. Capable of great tenderness, but also fierce infighting, this program follows the whales as they roam the earth's oceans.
座头鲸的叫声
某博士去收卫星数据，听到久违的拨号上网的声音啊。