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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)
The largest blue whale to date is a female that weighed 389,760 pounds (176,792 kg). A blue whale's head is so wide that an entire professional football team -- about 50 people -- could stand on its tongue.