Blue whale-sized mouthfuls make foraging super efficient

How much can a blue whale eat in a single mouthful and how much energy do they burn while foraging? These are the questions that Bob Shadwick from the University of British Columbia, Canada, and his colleagues have asked and discovered that blue whales can swallow almost 2,000,000kJ (almost 480,000kcalories) in a single mouthful of krill, and eat 90 times as much energy as they burn during a dive.

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