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A blue whale can weigh as much as 200 short tons (400,000 lbs). An adult blue whale can weigh up to around 180 metric tons (400,000lbs). A blue whale can weigh as much as 200 short tons (400,000 lbs).An adult blue whale can weigh up to around 180 metric tons (400,000lbs). A blue whale calve can weigh up to 2.7 metric tons (almost 6000lbs)
Big in Every Way. Blue whales are so big they are the biggest creature ever to have lived on earth - even bigger than the biggest dinosaurs! The largest whale ever measured was a female weighing 171,000 kgs and measuring over 90ft./27m long. The longest whale measured in at over 110ft./33m.