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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)
These whales are 40-55 feet long and weigh up to about 45 tons. They are found most frequently in tropical and subtropical waters. There may be two Bryde's whale species - a coastal species (which would be called Balaenoptera edeni) and an offshore form ( Balaenoptera brydei).