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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)
At full maturity the male killer whale will usually grow to an average length of 20 â 26 ft. long and weigh an average of 8,000 lbs. â 12,000 lbs. while an adult female killer whale will grow to an average length of 16 â 23 ft. long and weigh between 3,000 lbs. â 6,000 lbs.